US2942691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air line filter
Assignee: Watts Regulator Co
•
Filing: 1956-09-27
•
Granted: 1960-06-28
•
Expires: 1976-09-27
Abstract
No abstract record available.
Inventors
- 👤 Wendell M Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:13
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D45/00; B01D45/04; B01D45/08; B01D46/0027; B01D46/003; B01D46/0031; B01D46/0039; B01D46/0041; B01D46/0043; F; F04; F04B; F04B39/00; F04B39/16; B01D2275/00; B01D2275/20; B01D2275/201; Y; Y10; Y10S; Y10S55/00; Y10S55/17
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |