US2284929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making die spotting devices
Assignee: Individual
•
Filing: 1940-10-02
•
Granted: 1942-06-02
•
Expires: 1960-10-02
Abstract
No abstract record available.
Inventors
- 👤 Alexander P Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
B; B21; B21D; B21D37/00; B21D37/20; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389
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) | 1945-06-01 | 1945-12-01 | 1946-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-01 | 1949-12-01 | 1950-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-01 | 1953-12-01 | 1954-06-02 | $7700.00 | Window Closed / Lapsed |