US2188767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement and cementing operation
Assignee: Standard Oil Development Co
•
Filing: 1936-07-25
•
Granted: 1940-01-30
•
Expires: 1956-07-25
Abstract
No abstract record available.
Inventors
- 👤 George E Cannon
- 👤 James L Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:27
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/38; C04B24/16; C04B28/00; C04B28/02; C04B28/04; C09; C09K; C09K8/00; C09K8/42; C09K8/46
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) | 1943-01-29 | 1943-07-31 | 1944-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-29 | 1947-07-31 | 1948-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-29 | 1951-07-31 | 1952-01-30 | $7700.00 | Window Closed / Lapsed |