US3001279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of working hard brittle metals
Assignee: EVA R LEMERT
•
Filing: 1956-05-28
•
Granted: 1961-09-26
•
Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 John F Sherrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:25
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/02; B21D; B21D22/00; B21D22/02; B21D22/04; Y; Y10; Y10S; Y10S72/00; Y10S72/70; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49947; Y10T29/49954; Y10T29/49956; Y10T29/49972; Y10T29/53; Y10T29/53709; Y10T29/5377; Y10T29/53774
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1585327A
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US1430692A
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US1910954A
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US2156167A
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US2382045A
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US2441517A
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US2578585A
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US2697953A
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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) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |