US3305213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve construction
Assignee: Individual
•
Filing: 1965-08-16
•
Granted: 1967-02-21
•
Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Marvin H Grove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:24
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/04; F16K27/044; F16K3/00; F16K3/02; F16K3/0227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE471417C
Cited
US1708851A
Cited
US2514532A
Cited
US2810542A
Cited
US3044741A
Cited
US3013769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |