Patent US2251226A successfully refreshed from Google Patents.
US1948115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool
Assignee: Barnes Drill Co
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Filing: 1931-11-23
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Granted: 1934-02-20
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Expires: 1951-11-23
Abstract
No abstract record available.
Inventors
- 👤 Albert M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:51
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/70; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6757
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-02-19 | 1937-08-21 | 1938-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-19 | 1941-08-21 | 1942-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-19 | 1945-08-21 | 1946-02-20 | $7700.00 | Window Closed / Lapsed |