US2521831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile fabric
Assignee: Riverside Mills
•
Filing: 1947-04-28
•
Granted: 1950-09-12
•
Expires: 1967-04-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Cone
- 👤 Lewis Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:15
CPC Classifications
D; D04; D04H; D04H11/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059; Y10T156/1089; Y10T156/12; Y10T156/1348; Y10T156/1352; Y10T156/1361; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1722; Y10T156/1727; Y10T156/1732; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T428/24041; Y10T428/2405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1194874A
Cited
US645236A
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US1271005A
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US1795632A
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US1907492A
Cited
US1864478A
Cited
US2101906A
Cited
US2202663A
Cited
US2358204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |