Patent US3383271A successfully refreshed from Google Patents.
US3383271A
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US
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Water repellent gypsum board
Assignee: United States Gypsum Co
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Filing: 1964-01-20
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Granted: 1968-05-14
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 James R Roberts
- 👤 William J Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:52
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/46; B; B28; B28B; B28B1/00; B28B1/52; B28B19/00; B28B19/0092; C04B28/00; C04B28/14; C04B41/50; C04B41/5007; C04B41/52; C04B41/60; C04B41/61; C04B41/70; E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/232; Y10T428/31504; Y10T428/31844; Y10T428/31848
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2198776A
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US2432963A
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US2560521A
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US2597901A
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US2954313A
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US2965596A
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US3328326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |