Patent US2657111A successfully refreshed from Google Patents.
US2657111A
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US
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Assignee: Individual
•
Filing: 1949-12-07
•
Granted: 1953-10-27
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Expires: 1969-12-07
Abstract
No abstract record available.
Inventors
- 👤 Sigfred P Kjellgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:52
CPC Classifications
D; D05; D05B; D05B91/00; D05B91/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190117468A
Cited
US898153A
Cited
US1078795A
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US1134908A
Cited
US1183917A
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US1221796A
Cited
US1448845A
Cited
US2153322A
Cited
US2070055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |