US3196494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire resistant door
Assignee: United States Plywood Corp
•
Filing: 1963-02-14
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Granted: 1965-07-27
•
Expires: 1983-02-14
Abstract
No abstract record available.
Inventors
- 👤 Hartman Seymour
- 👤 Reuben F Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:32
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/10; E06B5/16; E06B3/00; E06B3/70; E06B3/7015; E06B2003/7025; E06B2003/7049; E06B2003/7051; E06B2003/7059; E06B2003/7061; E06B2003/7063; E06B3/82; E06B3/822; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/164; Y10T428/167; Y10T428/23; Y10T428/232; Y10T428/24; Y10T428/24355; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A FIRE DOOR COMPRISING A CORE COMPOSED ESSENTIALLY OF CALCIUM SILICATED SUBHYDRATE, A PERIPHERAL FRAME SURROUNDING SAID CALCIUM SILICATE SUBHYDRATES ON ALL SIDES TO FORM A CONTINUOUS OUTSIDE AREA, PERIPHERAL FRAME COMPOSED ESSENTIALLY OF ADBESTOS FIBERS, DIATOMACEOUS EARTH AND AN INORGANIC BINDER, AND A CROSSBAND ON EACH SIDE OF SAID CORE COMPOSED ESSENTIALLY OF AN ASBESTOS NEOPRENE COMPOSITION, AND SAID CROSSBANDS EXTENDING OVER THE ENTIRE CORE AND FRAME IN A SINGLE PLANE DIRECTION.
Claim 2
Dependent Claim
73 words
A FIRE DOOR COMPRISING A CORE COMPOSED ESSENTIALLY OF CALCIUM SILICATED SUBHYDRATE, A PERIPHERAL FRAME SURROUNDING SAID CALCIUM SILICATE SUBHYDRATES ON ALL SIDES TO FORM A CONTINUOUS OUTSIDE AREA, PERIPHERAL FRAME COMPOSED ESSENTIALLY OF ADBESTOS FIBERS, DIATOMACEOUS EARTH AND AN INORGANIC BINDER, AND A CROSSBAND ON EACH SIDE OF SAID CORE COMPOSED ESSENTIALLY OF AN ASBESTOS NEOPRENE COMPOSITION, AND SAID CROSSBANDS EXTENDING OVER THE ENTIRE CORE AND FRAME IN A SINGLE PLANE DIRECTION.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |