US3420299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means of cementing a casing into a well structure
Assignee: ROBERT E CLOUD
•
Filing: 1965-10-07
•
Granted: 1969-01-07
•
Expires: 1985-10-07
Abstract
No abstract record available.
Inventors
- 👤 Robert E Cloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:45
CPC Classifications
C; C04; C04B; C04B22/00; C04B22/008; C04B20/00; C04B20/10; C04B40/00; C04B40/06; C04B40/0633; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04B2111/00; C04B2111/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2492212A
Cited
GB805848A
Cited
US2836555A
Cited
US3028913A
Cited
US3227213A
Cited
US3340929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |