US2726732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air line filter and automatic drain valve
Assignee: Norgren LLC
•
Filing: 1952-07-17
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Granted: 1955-12-13
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Expires: 1972-07-17
Abstract
No abstract record available.
Inventors
- 👤 Delbert G Faust
- 👤 Jr Jesse A Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:02
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/20; F16T1/38; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304; Y10T137/3052; Y10T137/3068; Y10T137/3077; Y10T137/3102; Y10T137/3105; Y10T137/7287; Y10T137/7313; Y10T137/7316; Y10T137/7319; Y10T137/7358; Y10T137/7368; Y10T137/7371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |