US3516882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacture of gypsum wallboard
Assignee: Celotex Corp
•
Filing: 1966-01-24
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Granted: 1970-06-23
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Expires: 1986-01-24
Abstract
No abstract record available.
Inventors
- 👤 Robert G Cummisford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:32
CPC Classifications
B; B28; B28B; B28B19/00; B28B19/0092; C; C04; C04B; C04B24/00; C04B24/24; C04B24/38; C04B24/383; E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043; C04B2111/00; C04B2111/00474; C04B2111/00612; C04B2111/0062; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249965; Y10T428/249966; Y10T428/249967; Y10T428/249968; Y10T428/31504; Y10T428/31971; Y10T428/31993; Y10T428/31996
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |