Patent US2138563A successfully refreshed from Google Patents.
Patent US2290633A successfully refreshed from Google Patents.
US2290633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated paper and paper products
Assignee: Kelco Co
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Filing: 1940-09-18
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Granted: 1942-07-21
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Expires: 1960-09-18
Abstract
No abstract record available.
Inventors
- 👤 Paul H Cate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:40
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; D21H19/10; D21H19/12; D21H19/14; D21H19/18; D21H19/36; D21H19/38; D21H19/42; D21H19/44; D21H27/00; D21H27/10; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808; Y10T428/31844; Y10T428/31848
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) | 1945-07-20 | 1946-01-19 | 1946-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-20 | 1950-01-19 | 1950-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-20 | 1954-01-19 | 1954-07-21 | $7700.00 | Window Closed / Lapsed |