Patent US2309218A successfully refreshed from Google Patents.
US2309218A
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Welding flash trimmer
Assignee: Individual
•
Filing: 1941-04-23
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Granted: 1943-01-26
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Expires: 1961-04-23
Abstract
No abstract record available.
Inventors
- 👤 Frank W Schwinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:26
CPC Classifications
B; B23; B23D; B23D79/00; B23D79/02; Y; Y10; Y10T; Y10T409/00; Y10T409/50; Y10T409/501312; Y10T409/501476; Y10T409/50164; Y10T409/501968; Y10T82/00; Y10T82/25; Y10T82/2522
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) | 1946-01-25 | 1946-07-27 | 1947-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-01-25 | 1950-07-27 | 1951-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-01-25 | 1954-07-27 | 1955-01-26 | $7700.00 | Window Closed / Lapsed |