Patent US3531842A successfully refreshed from Google Patents.
US3531842A
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US
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Assignee: C AND L MACHINE SHOP Inc
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Filing: 1967-11-20
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Granted: 1970-10-06
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Expires: 1987-11-20
Abstract
No abstract record available.
Inventors
- 👤 Carlton L Bowling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:43
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/04; B23B27/14; B23B27/16; B23B27/1685; B23B2210/00; B23B2210/08; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2222; Y10T407/2238; Y10T407/224; Y10T407/2244; Y10T407/227; Y10T407/2272; Y10T407/2282; Y10T407/2284; Y10T407/25; Y10T407/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2275326A
Cited
US2377519A
Cited
US2390653A
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US2438630A
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US2398913A
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US2644224A
Cited
US2787823A
Cited
US3316617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |