US3399726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of plugging perforations in casings
Assignee: Gulf Research and Development Co
•
Filing: 1966-05-23
•
Granted: 1968-09-03
•
Expires: 1986-05-23
Abstract
No abstract record available.
Inventors
- 👤 Martin H Harris
- 👤 James W Jennings
- 👤 Francis M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:38
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2257784A
Cited
US2167747A
Cited
US2738011A
Cited
US2740480A
Cited
US2754910A
Cited
US2999545A
Cited
US3028914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |