US2981514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: SIGMA INSTR CO Ltd
•
Filing: 1957-06-05
•
Granted: 1961-04-25
•
Expires: 1977-06-05
Abstract
No abstract record available.
Inventors
- 👤 Loxham John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:24
CPC Classifications
F; F16; F16K; F16K1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2118013A
Cited
US1200676A
Cited
US1980752A
Cited
US2061852A
Cited
US2096807A
Cited
US2618457A
Cited
US2691827A
Cited
US2701119A
Cited
US2805040A
Cited
US2797701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |