Patent US2280351A successfully refreshed from Google Patents.
US2280351A
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Swaging apparatus
Assignee: H A DOUGLAS Manufacturing Co
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Filing: 1940-02-01
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Granted: 1942-04-21
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Expires: 1960-02-01
Abstract
No abstract record available.
Inventors
- 👤 Charles S Penfold
- 👤 Elmer E Johnson
- 👤 George H Brailsford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:08
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/04; H01R43/058; H01R43/0585; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53087; Y10T29/5313; Y10T29/532; Y10T29/53209; Y10T29/53213; Y10T29/53235; Y10T29/53987
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) | 1945-04-20 | 1945-10-20 | 1946-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-20 | 1949-10-20 | 1950-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-20 | 1953-10-20 | 1954-04-21 | $7700.00 | Window Closed / Lapsed |