Patent US1394679A successfully refreshed from Google Patents.
US1394679A
Expired / Lapsed
US
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Automatic pressure-operated valve for engines or pumps
Assignee: Individual
•
Filing: 1919-07-24
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Granted: 1921-10-25
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Expires: 1939-07-24
Abstract
No abstract record available.
Inventors
- 👤 Johns Morgan Jefferson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:44
CPC Classifications
F; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06
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) | 1924-10-24 | 1925-04-25 | 1925-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-10-24 | 1929-04-25 | 1929-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-10-24 | 1933-04-25 | 1933-10-25 | $7700.00 | Window Closed / Lapsed |