Patent US3587491A successfully refreshed from Google Patents.
US3587491A
Expired / Lapsed
US
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Cam removal unit
Assignee: Singer Co
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Filing: 1970-05-04
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Granted: 1971-06-28
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Expires: 1990-05-04
Abstract
Abstract A PATTERN CAM REMOVAL DEVICE FOR A ZIGZAG SEWING MACHINE WHICH PROVIDES FOR THE ELEVATION OF A PLUNGER IN RESPONSE TO THE MANUAL DEPRESSION OF A PATTERN CAM ON A CAM SEAT AND FOR THE ELEVATION OF THE PATTERN CAM UPON MANUAL DEPRESSION OF THE PLUNGER.
Inventors
- 👤 Louis Fawcett Daman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:45
CPC Classifications
D; D05; D05B; D05B19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |