Patent US2571457A successfully refreshed from Google Patents.
US2214231A
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Sheet material
Assignee: Individual
•
Filing: 1936-10-08
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Granted: 1940-09-10
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Expires: 1956-10-08
Abstract
No abstract record available.
Inventors
- 👤 Grace P Ketter
- 👤 Wagner George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:14
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/24; B41N1/241; C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/32; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/22; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/283; Y10T428/2852
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) | 1943-09-10 | 1944-03-11 | 1944-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-10 | 1948-03-11 | 1948-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-10 | 1952-03-11 | 1952-09-10 | $7700.00 | Window Closed / Lapsed |