US2492212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for sealing earth formations and an earth sealing plug suitable therefor
Assignee: United States Gypsum Co
•
Filing: 1945-01-25
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Granted: 1949-12-27
•
Expires: 1965-01-25
Abstract
No abstract record available.
Inventors
- 👤 Manvel C Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:12
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04; C04B; C04B28/00; C04B28/14; C04B2111/00; C04B2111/20; C04B2111/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB453703A
Cited
GB480316A
Cited
GB480339A
Cited
US2346999A
Cited
US2255998A
Cited
US2191652A
Cited
US2274297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |