US3466003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency valve
Assignee: Weston Instruments Inc
•
Filing: 1966-12-30
•
Granted: 1969-09-09
•
Expires: 1986-12-30
Abstract
No abstract record available.
Inventors
- 👤 Julius C Boonshaft
- 👤 Kenneth W Zeuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:07
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0402; F15B13/044; F15B13/0446; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1295316A
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US1512805A
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US2485280A
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US2904075A
Cited
US3059663A
Cited
US3040768A
Cited
US3099280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |