US2797407A
Expired / Lapsed
US
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Assignee: Grimes Manufacturing Co
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Filing: 1955-12-06
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Granted: 1957-06-25
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Expires: 1975-12-06
Abstract
No abstract record available.
Inventors
- 👤 Paul H Greenlee
- 👤 Robert S Rinkinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:20
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/60; H04M3/64; H02; H02B; H02B15/00; F; F21; F21W; F21W2111/00
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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |