HEATILATOR INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5070798 Pellet burner appliances and burners thereforExpiredAug 31, 90Dec 10, 91[F23K]
4643165 Nonpolluting, high efficiency firebox for wood burning stoveExpiredFeb 26, 86Feb 17, 87[F24C]
4520791 Jacketed wood stoveExpiredOct 14, 83Jun 04, 85[F24B]
4422436 Jacketed wood stoveExpiredMar 22, 82Dec 27, 83[F24C]
D264373 WoodstoveExpiredMay 16, 80May 11, 82[D230]
4305374 Removable fireplace hearth floor and method for using sameExpiredJun 25, 79Dec 15, 81[F24B]
4270515 Fireplace having integral grateExpiredOct 11, 79Jun 02, 81[F23H]
4267818 Damper constructionExpiredJun 25, 79May 19, 81[F24B]
4249510 Hearth ventilators for domestic fireplacesExpiredJun 25, 79Feb 10, 81[F24B]
4222458 Basement emergency exitExpiredJul 25, 79Sep 16, 80[E06C]

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