US3020926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breather valves
Assignee: Individual
•
Filing: 1958-09-08
•
Granted: 1962-02-13
•
Expires: 1978-09-08
Abstract
No abstract record available.
Inventors
- 👤 Browning Harrison
- 👤 Wesley C Patterson
- 👤 Ilya S Livney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:23
CPC Classifications
F; F42; F42B; F42B39/00; F42B39/20; B; B64; B64D; B64D1/00; F16; F16K; F16K17/00; F16K17/18; F16K17/19; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7779; Y10T137/7781; Y10T137/7782; Y10T137/7833; Y10T137/7834; Y10T137/794; Y10T137/8013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US610359A
Cited
US1945760A
Cited
US1035803A
Cited
GB191128982A
Cited
US1783646A
Cited
US2067924A
Cited
US2452612A
Cited
US2666278A
Cited
US2859770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |