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Class Information
Number: 249/17
Name: Static molds > In situ construction engineering type or building type-mold or form > Forming building structure > Chimney
Description: Apparatus for forming a chimney.

Patents under this class:

Patent Number Title Of Patent Date Issued
6959903 Cast in place chimney form Nov. 1, 2005
6508907 Chimney crown installation system Jan. 21, 2003
6349522 Brick block and process and apparatus therefor Feb. 26, 2002
6153130 Method of installing a form in a foundry furnace Nov. 28, 2000
5137251 Pour window for a concrete form Aug. 11, 1992
5125617 Adjustable radius walers for forming Jun. 30, 1992
5029803 Device for adapting a formwork element to given radii of a circular formwork Jul. 9, 1991
5009047 Chimney crown mold Apr. 23, 1991
4917346 Concrete form shuttering Apr. 17, 1990
4915345 Concrete forming system for curved walls Apr. 10, 1990
4742985 Formwork assembly for a poured concrete structure May. 10, 1988
4729541 Formwork for round or polygonal construction Mar. 8, 1988
4728073 Formwork for forming reservoirs and pools Mar. 1, 1988
4679763 Concrete form having adjustable curvature and method for producing same Jul. 14, 1987
4619433 Apparatus for erecting arcuate walls of concrete or the like Oct. 28, 1986
4562989 Apparatus for construction of concrete walls Jan. 7, 1986
4081227 Slip form Mar. 28, 1978
4076777 Method and apparatus for forming a concrete roof Feb. 28, 1978
4033547 Form for pouring conically tapering concrete structures Jul. 5, 1977
4021014 Form for concrete walls May. 3, 1977

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