US1372246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming metal blanks of varying cross-section
Assignee: Detroit Pressed Steel Co
•
Filing: 1918-03-07
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Granted: 1921-03-22
•
Expires: 1938-03-07
Abstract
No abstract record available.
Inventors
- 👤 Alden L Putnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:19
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/16; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49481; Y10T29/49492; Y10T29/49496; Y10T29/49504
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) | 1924-03-21 | 1924-09-20 | 1925-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-03-21 | 1928-09-20 | 1929-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-03-21 | 1932-09-20 | 1933-03-22 | $7700.00 | Window Closed / Lapsed |