Patent US2041147A successfully refreshed from Google Patents.
US3534640A
Expired / Lapsed
US
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Tool coupling device
Assignee: General Electro Mechanical Corp
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Filing: 1968-05-16
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Granted: 1970-10-20
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Expires: 1988-05-16
Abstract
No abstract record available.
Inventors
- 👤 David S Macy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:03
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/113; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018; Y10T403/7075; Y10T403/7077; Y10T403/7079; Y10T408/00; Y10T408/89; Y10T408/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191102738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |