US2644651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bobbin
Assignee: Individual
•
Filing: 1950-05-03
•
Granted: 1953-07-07
•
Expires: 1970-05-03
Abstract
No abstract record available.
Inventors
- 👤 William F Stahl
- 👤 Fred V Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:03
CPC Classifications
H; H01; H01F; H01F5/00; H01F5/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US948430A
Cited
US1731219A
Cited
US2027962A
Cited
US2183691A
Cited
US2254109A
Cited
US2228108A
Cited
US2299113A
Cited
US2294711A
Cited
US2314749A
Cited
US2375704A
Cited
US2519840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |