US3411260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control seal and fracturing member
Assignee: Individual
•
Filing: 1966-02-25
•
Granted: 1968-11-19
•
Expires: 1986-02-25
Abstract
No abstract record available.
Inventors
- 👤 Robert F Dill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:13
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/10; E01C23/00; E01C23/02; E01C23/021; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6807
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1903608A
Cited
US1918554A
Cited
US2041961A
Cited
US2042408A
Cited
US2405844A
Cited
GB775558A
Cited
FR1198881A
Cited
US3023681A
Cited
US3128576A
Cited
FR1310670A
Cited
US3308726A
Cited
US3323426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |