US2962919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gripping dies for pipe wrenches and similar devices
Assignee: WEB WILSON OIL TOOLS Inc
•
Filing: 1959-02-20
•
Granted: 1960-12-06
•
Expires: 1979-02-20
Abstract
No abstract record available.
Inventors
- 👤 John F Grundmann
- 👤 Benjamin A Hilliard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:31
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10; E21B19/16; E21B19/161; Y; Y10; Y10T; Y10T279/00; Y10T279/19; Y10T279/1986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1908421A
Cited
US2098369A
Cited
US2294548A
Cited
US2326962A
Cited
US2720128A
Cited
US2760395A
Cited
US2873636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |