Patent US2781669A successfully refreshed from Google Patents.
US2781669A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1952-09-02
•
Granted: 1957-02-19
•
Expires: 1972-09-02
Abstract
No abstract record available.
Inventors
- 👤 Whitesell Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:59
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/36; F16H55/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US788185A
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US1152597A
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US1161291A
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US1628220A
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US1645552A
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US1803357A
Cited
US1811916A
Cited
US1838164A
Cited
US2263690A
Cited
US2422065A
Cited
US2432701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |