US2520650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accessory system operable from a fluctuating pressure source with a normally by-passed secondary source
Assignee: Trico Products Corp
•
Filing: 1947-03-08
•
Granted: 1950-08-29
•
Expires: 1967-03-08
Abstract
No abstract record available.
Inventors
- 👤 John R Oishei
- 👤 Rappl Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:34
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1848754A
Cited
USRE20219E
Cited
US1719134A
Cited
US2245626A
Cited
US2379719A
Cited
US2427347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |