US3522818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-reducing valve for breathing apparatus
Assignee: ZAKLADY MECHANIKI PRECYZJNEJ
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Filing: 1967-12-04
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Granted: 1970-08-04
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Expires: 1987-12-04
Abstract
No abstract record available.
Inventors
- 👤 Leszek Suchy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:24
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; A; A62; A62B; A62B9/00; A62B9/02; G05D16/0402; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7795; Y10T137/7801; Y10T137/7809; Y10T137/781; Y10T137/7811
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |