US2720219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve construction
Assignee: Grove Valve and Regulator Co
•
Filing: 1951-10-09
•
Granted: 1955-10-11
•
Expires: 1971-10-09
Abstract
No abstract record available.
Inventors
- 👤 Marvin H Grove
- 👤 Austin U Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:19
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/16; F16K41/18; F16K3/00; F16K3/22; F16K3/24; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/87016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US382469A
Cited
US1047774A
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US1293858A
Cited
US1385019A
Cited
FR693355A
Cited
US2408000A
Cited
US2431437A
Cited
US2583539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |