Patent US2977810A successfully refreshed from Google Patents.
US2977810A
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US
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Assignee: TRUTH TOOL CO
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Filing: 1955-10-17
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Granted: 1961-04-04
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Harold L Stavenau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:19
CPC Classifications
E; E05; E05F; E05F11/00; E05F11/02; E05F11/08; E05F11/12; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18856
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |