US2973181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Individual
•
Filing: 1960-10-31
•
Granted: 1961-02-28
•
Expires: 1980-10-31
Abstract
No abstract record available.
Inventors
- 👤 Johnson Jesse Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:44
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/34; F16K3/02; F16K3/04; F16K3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE24102E
Cited
US2732170A
Cited
DE724917C
Cited
US2506097A
Cited
US2606740A
Cited
US2547831A
Cited
US2651320A
Cited
US2845949A
Cited
US2805836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |