Patent US3223760A successfully refreshed from Google Patents.
Patent US2772853A successfully refreshed from Google Patents.
US2772853A
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US
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Assignee: Individual
•
Filing: 1952-04-07
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Granted: 1956-12-04
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Expires: 1972-04-07
Abstract
No abstract record available.
Inventors
- 👤 Lee R Woodworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:20
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/06; F01D5/066; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5721; Y10T403/5793
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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |