US3454041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure reducer with check valve
Assignee: Individual
•
Filing: 1967-01-04
•
Granted: 1969-07-08
•
Expires: 1987-01-04
Abstract
No abstract record available.
Inventors
- 👤 Fredy Masson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:03
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/103; G05D16/106; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7794; Y10T137/7808
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |