US1493774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-relief valve
Assignee: Imperial Brass Manufacturing Co
•
Filing: 1920-08-27
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Granted: 1924-05-13
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Expires: 1940-08-27
Abstract
No abstract record available.
Inventors
- 👤 Dorsey Parmer
- 👤 Robert D Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:41
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/08; F16K17/085; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2924; Y10T137/7722; Y10T137/7781; Y10T137/7782; Y10T137/7835; Y10T137/7836
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) | 1927-05-13 | 1927-11-12 | 1928-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-05-13 | 1931-11-12 | 1932-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-05-13 | 1935-11-12 | 1936-05-13 | $7700.00 | Window Closed / Lapsed |