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US2666305A
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US
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Swing frame changing ring
Assignee: Individual
•
Filing: 1949-11-25
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Granted: 1954-01-19
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Sandor A Wittmayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:16
CPC Classifications
A; A44; A44C; A44C17/00; A44C17/02; A44C17/0258; A44C9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US875003A
Cited
US950912A
Cited
US1125869A
Cited
US1130917A
Cited
GB111237A
Cited
US1712783A
Cited
US1743563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |