US2198776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-resistant cementitious product
Assignee: United States Gypsum Co
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Filing: 1936-08-29
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Granted: 1940-04-30
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Expires: 1956-08-29
Abstract
No abstract record available.
Inventors
- 👤 George D King
- 👤 Thomas P Camp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:39
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/1018; C04B28/00; C04B28/02; C04B41/00; C04B41/0018; C04B2111/00; C04B2111/00474; C04B2111/00612; C04B2111/0062; C04B2111/20; C04B2111/27; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808
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) | 1943-04-30 | 1943-10-30 | 1944-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-30 | 1947-10-30 | 1948-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-30 | 1951-10-30 | 1952-04-30 | $7700.00 | Window Closed / Lapsed |