Patent US2959897A successfully refreshed from Google Patents.
US2959897A
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Assignee: United States Gypsum Co
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Filing: 1956-06-28
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Granted: 1960-11-15
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Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 George W Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:19
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/02; E04B5/10; F; F16; F16B; F16B15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US159611A
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GB190918541A
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US1597318A
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US1777228A
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US2128798A
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US2391250A
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US2667243A
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US2601363A
Cited
US2740505A
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US2751052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |