US3216697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biased plug valve
Assignee: Individual
•
Filing: 1962-01-31
•
Granted: 1965-11-09
•
Expires: 1982-01-31
Abstract
No abstract record available.
Inventors
- 👤 Emil G Holmberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:36
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/02; F16K5/0257; F16K5/0264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1892835A
Cited
US2055232A
Cited
US2756960A
Cited
US2864579A
Cited
US2816693A
Cited
US3035811A
Cited
US3090594A
Cited
US3160387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |