Patent US3566564A successfully refreshed from Google Patents.
US3566564A
Expired / Lapsed
US
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Fire resisting doors having metallic outer layers
Assignee: BASF SE
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Filing: 1968-12-20
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Granted: 1971-03-02
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Expires: 1988-12-20
Abstract
Abstract A FIRE-RESISTING DOOR HAVING STIFFENING MEMBERS INSIDE A DOOR FRAME. BOTH THE FRAME AND THE STIFFENING MEMBERS ARE COVERED WITH AN INSULATING LAYER AND A METALLIC OUTER LAYER, THE LAYERS BEING JOINED IN SUCH A WAY THAT THE UNION IS DESTROYED BY THE ACTION OF HEAT.
Inventors
- 👤 Rudolf Gaeth
- 👤 Fritz Stastny
- 👤 Bernhard Schmitt
- 👤 Rudolf Breu
- 👤 Friedhelm Gaertner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:57
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/10; E06B5/16; E06B5/164; E06B3/00; E06B3/70; E06B3/7015; E06B2003/7021; E06B2003/7049; E06B2003/7051; E06B2003/7059; E06B3/82; E06B3/822
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |