US2298132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for forming hollow structures
Assignee: Individual
•
Filing: 1940-10-11
•
Granted: 1942-10-06
•
Expires: 1960-10-11
Abstract
No abstract record available.
Inventors
- 👤 Charles A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:55
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/10; B21D22/12; B21D26/00; B21D26/02; B21D26/033; B21D26/047; B21D26/053; B21D26/059; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T83/00; Y10T83/04; Y10T83/0591
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) | 1945-10-05 | 1946-04-06 | 1946-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-10-05 | 1950-04-06 | 1950-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-10-05 | 1954-04-06 | 1954-10-06 | $7700.00 | Window Closed / Lapsed |