US3404734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of plugging formations by in situ chemical means
Assignee: Shell USA Inc
•
Filing: 1967-04-17
•
Granted: 1968-10-08
•
Expires: 1987-04-17
Abstract
No abstract record available.
Inventors
- 👤 Philip J Raifsnider
- 👤 Joseph S Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:38
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/5083; C09K8/502
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2773550A
Cited
US2747670A
Cited
US2786530A
Cited
US2946748A
Cited
US2914476A
Cited
US3358757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |