US1939842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for impregnating and/or surface coating fabrics
Assignee: Oliver United Filters Inc
•
Filing: 1930-05-23
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Granted: 1933-12-19
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Expires: 1950-05-23
Abstract
No abstract record available.
Inventors
- 👤 Carlton W Crumb
- 👤 Frank M Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:35
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/0086; D06N3/0088
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) | 1936-12-18 | 1937-06-19 | 1937-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-18 | 1941-06-19 | 1941-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-18 | 1945-06-19 | 1945-12-19 | $7700.00 | Window Closed / Lapsed |