US2810604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1954-08-25
•
Granted: 1957-10-22
•
Expires: 1974-08-25
Abstract
No abstract record available.
Inventors
- 👤 Frank B Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:51
CPC Classifications
B; B60; B60J; B60J1/00; B60J1/20; B60J1/2011; B60J1/2088; G; G02; G02C; G02C7/00; G02C7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US737979A
Cited
US1156578A
Cited
US1467203A
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US1600461A
Cited
US1585659A
Cited
US2074247A
Cited
US2239015A
Cited
US2511590A
Cited
US2665610A
Cited
US2689387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |