US2428540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of metallic rings
Assignee: J V PILCHER Manufacturing Co Inc
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Filing: 1942-10-24
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Granted: 1947-10-07
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Expires: 1962-10-24
Abstract
No abstract record available.
Inventors
- 👤 John F Babbitt
- 👤 Elston A Roop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:13
CPC Classifications
B; B21; B21K; B21K27/00; B21K27/06; B21D; B21D43/00; B21D43/28; B21D43/285; B23; B23D; B23D21/00; B23D21/14; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2122; Y10T83/2131; Y10T83/384; Y10T83/395; Y10T83/396
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |