US2537217A
Expired / Lapsed
US
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Assignee: Farr Co
•
Filing: 1946-09-27
•
Granted: 1951-01-09
•
Expires: 1966-09-27
Abstract
No abstract record available.
Inventors
- 👤 Richard S Farr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:35
CPC Classifications
B; B01; B01D; B01D46/00; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53696
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |