Patent US2658468A successfully refreshed from Google Patents.
US2658468A
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US
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Assignee: Individual
•
Filing: 1952-07-16
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Granted: 1953-11-10
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Expires: 1972-07-16
Abstract
No abstract record available.
Inventors
- 👤 John W Enfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:13
CPC Classifications
A; A61; A61J; A61J7/00; A61J7/04; A24; A24F; A24F15/00; A24F15/005; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7006; Y10T70/7034; Y10T70/704
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) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |