Patent US2391656A successfully refreshed from Google Patents.
US2391656A
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Treated metal sheet and method of making same
Assignee: Parker Rust Proof Co
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Filing: 1942-03-31
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Granted: 1945-12-25
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Expires: 1962-03-31
Abstract
No abstract record available.
Inventors
- 👤 Robert R Tanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/12; C23C22/14; B; B05; B05D; B05D7/00; B05D7/14; B05D2350/00; B05D2350/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24752; Y10T428/24802; Y10T428/24917; Y10T428/27; Y10T428/273
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) | 1948-12-24 | 1949-06-25 | 1949-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-12-24 | 1953-06-25 | 1953-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-12-24 | 1957-06-25 | 1957-12-25 | $7700.00 | Window Closed / Lapsed |