US2271091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heat treating and sintering
Assignee: MACH AND TOOL DESIGNING CO
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Filing: 1940-06-22
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Granted: 1942-01-27
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Expires: 1960-06-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Pecker
- 👤 Henry A Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:02
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/02; F27B9/16; F27B9/20; F27B9/26; F27B9/262; F27D; F27D21/00; F27D21/02; F27B9/145
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) | 1945-01-26 | 1945-07-28 | 1946-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-26 | 1949-07-28 | 1950-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-26 | 1953-07-28 | 1954-01-27 | $7700.00 | Window Closed / Lapsed |