US2927645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall scratching device
Assignee: Jersey Production Research Co
•
Filing: 1956-07-02
•
Granted: 1960-03-08
•
Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Boer George
- 👤 Martin E True
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:02
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; Y; Y10; Y10T; Y10T403/00; Y10T403/71; Y10T403/7171
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1232447A
Cited
US1827249A
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US2042086A
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US2412876A
Cited
US2506405A
Cited
US2523418A
Cited
US2594551A
Cited
US2738019A
Cited
US2812200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |