Patent US3546987A successfully refreshed from Google Patents.
US3546987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary metalworking apparatus
Assignee: Individual
•
Filing: 1969-05-21
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Granted: 1970-12-15
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Expires: 1989-05-21
Abstract
No abstract record available.
Inventors
- 👤 Charles R Procter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:35
CPC Classifications
B; B23; B23D; B23D31/00; B23D31/001; B23B; B23B5/00; B23B5/16; Y; Y10; Y10T; Y10T82/00; Y10T82/16; Y10T82/16147; Y10T82/16196; Y10T82/16213; Y10T82/16426; Y10T82/16639
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |