Patent US2283629A successfully refreshed from Google Patents.
US2283629A
Expired / Lapsed
US
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Die set for making metal-edge filters
Assignee: Individual
•
Filing: 1940-05-27
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Granted: 1942-05-19
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Expires: 1960-05-27
Abstract
No abstract record available.
Inventors
- 👤 Heftler Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:37
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/49826; Y10T29/49838; Y10T29/51; Y10T29/5197; Y10T83/00; Y10T83/04; Y10T83/0448; Y10T83/0524; Y10T83/0529; Y10T83/0534; Y10T83/444; Y10T83/4577
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) | 1945-05-18 | 1945-11-17 | 1946-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-05-18 | 1949-11-17 | 1950-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-05-18 | 1953-11-17 | 1954-05-19 | $7700.00 | Window Closed / Lapsed |