US2760749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite block for shut-off mechanism
Assignee: J P RATIGAN Inc
•
Filing: 1951-01-11
•
Granted: 1956-08-28
•
Expires: 1971-01-11
Abstract
No abstract record available.
Inventors
- 👤 James P Ratigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:26
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/061; E21B33/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1713364A
Cited
US1989429A
Cited
US2218093A
Cited
US2144403A
Cited
US2240252A
Cited
US2480055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |