Patent US3420200A successfully refreshed from Google Patents.
US3420200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular sewing machines
Assignee: Singer Co
•
Filing: 1966-02-03
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Granted: 1969-01-07
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Expires: 1986-02-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:30
CPC Classifications
D; D05; D05B; D05B57/00; D05B57/08; D05B57/10; D05B57/14; D05B57/143; D05B57/16; D05B73/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |