US3486965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sag-resistant gypsum board and method therefor
Assignee: United States Gypsum Co
•
Filing: 1966-11-21
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Granted: 1969-12-30
•
Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 Donald R Janninck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:17
CPC Classifications
C; C04; C04B; C04B22/00; C04B22/08; C04B22/10; C04B2111/00; C04B2111/00034; C04B2111/00094; C04B2111/00474; C04B2111/00612; C04B2111/0062; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/232
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3189511A
Cited
US3383271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |