US3388680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Built-in automatic buttonholing devices
Assignee: Singer Co
•
Filing: 1966-04-07
•
Granted: 1968-06-18
•
Expires: 1986-04-07
Abstract
No abstract record available.
Inventors
- 👤 Russell A Fritts
- 👤 Stanley J Ketterer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:37
CPC Classifications
D; D05; D05B; D05B3/00; D05B3/24; D10; D10B; D10B2501/00; D10B2501/06; D10B2501/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2841106A
Cited
US3298339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |