US2600898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically operated valve seat
Assignee: Individual
•
Filing: 1948-05-28
•
Granted: 1952-06-17
•
Expires: 1968-05-28
Abstract
No abstract record available.
Inventors
- 👤 Vasco T Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:31
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/18; F16K5/188
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US783953A
Cited
US1616386A
Cited
DE520188C
Cited
DE530687C
Cited
US2030458A
Cited
US1954018A
Cited
US2356630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |