Patent US2139872A successfully refreshed from Google Patents.
US2139872A
Expired / Lapsed
US
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Sheet metal and procedure for producing the same
Assignee: Individual
•
Filing: 1933-08-07
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Granted: 1938-12-13
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Expires: 1953-08-07
Abstract
No abstract record available.
Inventors
- 👤 Worthington Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:15
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/22; B21B1/24; B21B13/00; B21B13/14; B21B13/145; B21B13/147; B21B31/00; B21B31/16; B21B31/20; B21B2031/206; B21B2267/00; B21B2267/02; B21B2267/06; B21B2267/065; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T428/00; Y10T428/12
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) | 1941-12-12 | 1942-06-13 | 1942-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-12 | 1946-06-13 | 1946-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-12 | 1950-06-13 | 1950-12-13 | $7700.00 | Window Closed / Lapsed |