US3254592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire door
Assignee: WEYERHEAUSER Co
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Filing: 1965-05-10
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Granted: 1966-06-07
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Harry A Chase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:00
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/10; E06B5/16; E06B3/00; E06B3/70; E06B3/7015; E06B2003/7025; E06B2003/7036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN COMBINATION: A FIRE DOOR; A DOOR FRAME HAVING A DOORSTOP THEREIN HAVING A WIDTH OF UP TO 1" SUPPORTING SAID FIRE DOOR; SAID DOOR COMPRISING A RIGID, FIREPROOF, MINERAL CORE; A PAIR OF EDGE STILES, UPPER AND LOWER CROSS RAILS EXTENDING AROUND THE PERIPERY OF SAID RIGID, FIREPROOF MINERAL CORE; SAID RIGID, FIREPROOF MINERAL CORE SPANNING THE DISTANCE BETWEEN SAID EDGE STILES AND BETWEEN SAID UPPER AND LOWER CROSS RAILS; SAID EDGE STILES, UPPER AND LOWER CROSS RAILS, AND RIGID, FIREPROOF MINERAL CORE BEING COVERED BY A FIREPROOF VENEER PANEL AND A DECORATIVE VENEER PANEL; EACH OF SAID EDGE STILES HAVING A TOTAL THICKNESS UP TO 5/8" TO PROVIDE AN OVERLAP BETWEEN SAID DOOR STOP AND SAID RIGID, FIREPROOF MINERAL CORE OF AT LEAST 1/8" WHEREBY UPON DESTRUCTUION OF SAID EDGE STILES BY FIRE, THE RIGID, FIREPROOF MINERAL CORE OF SAID DOOR WILL BEAR AGAINST SAID DOOR STOP.
Claim 2
Dependent Claim
149 words
IN COMBINATION: A FIRE DOOR; A DOOR FRAME HAVING A DOORSTOP THEREIN HAVING A WIDTH OF UP TO 1" SUPPORTING SAID FIRE DOOR; SAID DOOR COMPRISING A RIGID, FIREPROOF, MINERAL CORE; A PAIR OF EDGE STILES, UPPER AND LOWER CROSS RAILS EXTENDING AROUND THE PERIPERY OF SAID RIGID, FIREPROOF MINERAL CORE; SAID RIGID, FIREPROOF MINERAL CORE SPANNING THE DISTANCE BETWEEN SAID EDGE STILES AND BETWEEN SAID UPPER AND LOWER CROSS RAILS; SAID EDGE STILES, UPPER AND LOWER CROSS RAILS, AND RIGID, FIREPROOF MINERAL CORE BEING COVERED BY A FIREPROOF VENEER PANEL AND A DECORATIVE VENEER PANEL; EACH OF SAID EDGE STILES HAVING A TOTAL THICKNESS UP TO 5/8" TO PROVIDE AN OVERLAP BETWEEN SAID DOOR STOP AND SAID RIGID, FIREPROOF MINERAL CORE OF AT LEAST 1/8" WHEREBY UPON DESTRUCTUION OF SAID EDGE STILES BY FIRE, THE RIGID, FIREPROOF MINERAL CORE OF SAID DOOR WILL BEAR AGAINST SAID DOOR STOP.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |