US2902139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating the ends of elongated workpieces
Assignee: American Steel Foundries
•
Filing: 1956-10-01
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Granted: 1959-09-01
•
Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Robert C Brenk
- 👤 Frank G Cizek
- 👤 Richard E Dorenbos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:54
CPC Classifications
B; B21; B21D; B21D43/00; B21D43/006; B21D41/00; B21D41/04; Y; Y10; Y10S; Y10S198/00; Y10S198/957; Y10T; Y10T29/00; Y10T29/51; Y10T29/5196; Y10T29/5199; Y10T409/00; Y10T409/30; Y10T409/30868; Y10T409/308792
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |