US2431478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bleaching fibrous material
Assignee: Individual
•
Filing: 1942-07-25
•
Granted: 1947-11-25
•
Expires: 1962-07-25
Abstract
No abstract record available.
Inventors
- 👤 Raymond P Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:43
CPC Classifications
D; D06; D06B; D06B5/00; D06B5/12; D06B5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US211772A
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US525095A
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US1943031A
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US989126A
Cited
GB191307872A
Cited
US1231499A
Cited
US1768955A
Cited
US1915812A
Cited
US1976955A
Cited
GB517797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |