Patent US2803159A successfully refreshed from Google Patents.
US2803159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arbor
Assignee: NA Woodworth Co
•
Filing: 1954-09-14
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Granted: 1957-08-20
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Expires: 1974-09-14
Abstract
No abstract record available.
Inventors
- 👤 Hohwart George
- 👤 Ernest F Hohwart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:55
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/025; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17957; Y10T279/28; Y10T279/30; Y10T82/00; Y10T82/26; Y10T82/266
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2507999A
Cited
US2487934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |