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Patent US2813577A successfully refreshed from Google Patents.
US2813577A
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Assignee: Individual
•
Filing: 1955-08-08
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Granted: 1957-11-19
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Expires: 1975-08-08
Abstract
No abstract record available.
Inventors
- 👤 Willis B Weekly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/70; B60N2/7005; B60N2/80; B60N2/882
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735480A
Cited
US2648373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |