Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Chemistry
Class Information
Number: 549/507
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen as the only ring hetero atoms (class 540, subclass 1) > Oxygen containing hetero ring (e.g., dioxirane, etc.) > The hetero ring is five-membered > One double bond between ring members of the hetero ring
Description: Compounds wherein exactly one double bond is present between ring members of the hetero ring.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8410293 Process for the preparation of cyclic enol ethers Apr. 2, 2013
8404872 Production of 2,5-dihydrofurans and analogous compounds Mar. 26, 2013
8394934 Method and process for synthesis of 2',3'-didehydro-2',3'-dideoxynucleosides Mar. 12, 2013
8344023 2,5-di- and 2,2,5-trisubstituted di- and tetrahydrofuran derivatives and their use for the production of perfumes Jan. 1, 2013
8039645 Method for continuously producing 2,5-dihydrofuran Oct. 18, 2011
7632790 Trisubstituted furans suitable for the preparation of fragrance compositions Dec. 15, 2009
7135582 Transition metal complex having diphosphine compound as ligand Nov. 14, 2006
7128983 Furan-containing hole transporting materials Oct. 31, 2006
7091051 Chemiluminescence method of 1,2-dioxetane and composition for chemiluminescence Aug. 15, 2006
7078542 Nonlinear optical compounds and methods for their preparation Jul. 18, 2006
7019155 Hydrogenation of tetrahydroxybutane to tetrahydrofuran Mar. 28, 2006
6730800 Method for the production of tetrahydrofuran May. 4, 2004
6593481 Hydrogenation of 3,4-tetrahydrofurandiol to tetrahydrofuran Jul. 15, 2003
6395912 Isomerization of epoxyalkenes to 2,5-dihydrofurans May. 28, 2002
6353121 Separation of 2,5-dihydrofuran from water by extractive distillation Mar. 5, 2002
6346652 Asymmetric ring-closing metathesis reactions involving achiral and meso substrates Feb. 12, 2002
6342614 Isomerization of epoxyalkenes to 2,5-dihydrofurans Jan. 29, 2002
6335455 Process for the production of 2,5-dihydrofuran Jan. 1, 2002
6201139 Isomerization of epoxyalkenes to 2,5-dihydrofurans Mar. 13, 2001
6201138 Isomerization of epoxyalkenes to 2,5-dihydrofurans Mar. 13, 2001
6096673 Catalyst recovery in the production of 2,5-dihydrofuran by isomerization of vinyl oxirane Aug. 1, 2000
RE36719 Process for the manufacture of 2,5-dihydrofurans from .gamma.,.delta.-epoxybutenes May. 30, 2000
6066746 Radiation curing of dihydrofuran derivatives May. 23, 2000
6063939 Process for preparing unsaturated cyclic ethers May. 16, 2000
6002046 Process for the preparation of cyclopropyl alkyl ketones Dec. 14, 1999
5922863 Diene cyclization using ruthenium and osmium carbene complexes Jul. 13, 1999
5877333 1,2-dioxetane derivatives Mar. 2, 1999
5763627 Process for preparing cyclopropyl alkyl ketones and 4,5-dihydroalkyfurans Jun. 9, 1998
5693833 Process for the reactivation of iodine-containing catalysts Dec. 2, 1997
5681969 Continuous process for the conversion of 2,5-dihydrofuran to 2,3-dihydrofuran Oct. 28, 1997
5670672 Process for the preparation of 2,3-dihydrofurans Sep. 23, 1997
5629455 Process for preparing cyclopropyl alkyl ketones and 4,5-dihydroalkylfurans May. 13, 1997
5627291 Preparation of 2,5-dihydrofuran May. 6, 1997
5614644 Process for the removal of organic chlorides from furan and hydrogenated furans Mar. 25, 1997
5591874 Process for the preparation of 2,5-dihydrofuran compounds Jan. 7, 1997
5536851 Preparation of 2,3-dihydrofurans Jul. 16, 1996
5466832 Process for the manufacture of 2,5-dihydrofurans from .gamma., .delta.-epoxybutenes Nov. 14, 1995
5466832 Process for the manufacture of 2,5-dihydrofurans from .gamma., .delta.-epoxybutenes Nov. 14, 1995
5315019 Continuous process for the manufacture of 2,5-dihydrofurans from .gamma., .delta.-epoxybutenes May. 24, 1994
5254702 Process for the preparation of 2-oxytetrahydrofurans Oct. 19, 1993
5241085 Preparation of cyclic ethers Aug. 31, 1993
5238889 Process for the separation of oligomeric materials from a catalyst mixture Aug. 24, 1993
5196552 Preparation of cyclic ethers Mar. 23, 1993
5128370 Furans and lactones from sterptomycetes and the use thereof Jul. 7, 1992
5082956 Isomerization of epoxyalkenes to 2,5-dihydrofurans Jan. 21, 1992
5034545 Preparation of 2,5-dihydrofurans Jul. 23, 1991
4962210 Process for the preparation of high-purity tetrahydrofuran Oct. 9, 1990
4794190 Aromatic maleimide-isomaleimide compound Dec. 27, 1988
4551545 Process of preparing alkyl cis chrysanthemates Nov. 5, 1985
4536584 Process for the thermochemical conversion of biomass Aug. 20, 1985

1 2










 
 
  Recently Added Patents
Microfluidic cartridge and method of using same
Electronic device and printed circuit board
Multi-wired antenna for mobile apparatus
Removable case
Device and method for unified codes
Method and apparatus to adjust received signal
(4946
  Randomly Featured Patents
Apparatus and process for producing a corrugated web and an absorbent article comprising a corrugated web
Slitted and stubbed microstrips for high sensitivity, near-field electromagnetic detection of small samples and fields
Protection probes
Method and system for predicting the apparent flow conductivity of a heterogeneous medium
Reflection density measuring system
Method of modulating tissue growth using Frzb protein
Roof opening and closing device
Imaging processor
Compressor unit
Method and apparatus for securing indirect function calls by using program counter encoding