US3369607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement basket
Assignee: Individual
•
Filing: 1966-03-28
•
Granted: 1968-02-20
•
Expires: 1986-03-28
Abstract
No abstract record available.
Inventors
- 👤 Charles W Turbyfill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:01
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/136
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2290429A
Cited
US2392145A
Cited
US2652118A
Cited
US3114422A
Cited
US3119451A
Cited
US3196952A
Cited
US3292705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |