Patent US2805037A successfully refreshed from Google Patents.
US2805037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot controlled main valve for high pressure lines
Assignee: Individual
•
Filing: 1951-07-27
•
Granted: 1957-09-03
•
Expires: 1971-07-27
Abstract
No abstract record available.
Inventors
- 👤 John N Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:50
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; F; F22; F22D; F22D11/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE664746C
Cited
US2180320A
Cited
US2357657A
Cited
US2445163A
Cited
US2564896A
Cited
US2650615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |