Patent US2817532A successfully refreshed from Google Patents.
US2817532A
Expired / Lapsed
US
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Expansion arbor with inclined flats
Assignee: NA Woodworth Co
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Filing: 1955-10-20
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Granted: 1957-12-24
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Expires: 1975-10-20
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 12:01
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/40; B23B31/4006; B23B31/402; B23B31/4026; B23B31/02; B23B31/025; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/204; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1004; Y10T279/1008; Y10T279/1037; Y10T279/1041; Y10T279/17; Y10T279/17411; Y10T279/17478; Y10T279/34; Y10T279/3493
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) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |