US2279262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weighted cement
Assignee: ConocoPhillips Co
•
Filing: 1937-02-15
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Granted: 1942-04-07
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Expires: 1957-02-15
Abstract
No abstract record available.
Inventors
- 👤 Donald B Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:18
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04; C04B; C04B14/00; C04B14/02; C04B14/34; C04B14/36; C09K8/02; C09K8/04; C09K8/14; C09K8/145; C09K8/467; C09K8/48; C04B2111/00; C04B2111/00241; C04B2111/0031
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) | 1945-04-06 | 1945-10-06 | 1946-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-06 | 1949-10-06 | 1950-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-06 | 1953-10-06 | 1954-04-07 | $7700.00 | Window Closed / Lapsed |