US3428291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bellows metering valve
Assignee: NUCLEAR PRODUCTS CO
•
Filing: 1965-05-24
•
Granted: 1969-02-18
•
Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Francis J Callahan Jr
- 👤 Bernard J Gallagher
- 👤 Jonathan Tasker
- 👤 Earl D Shufflebarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:39
CPC Classifications
F; F16; F16K; F16K51/00; F16K51/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8292
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1912383A
Cited
US2234052A
Cited
US3097662A
Cited
US3295191A
Cited
US3331377A
Cited
US3322142A
Cited
US3326512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |