US3454035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve structure with seat insert centered by centering surfaces
Assignee: Danfoss AS
•
Filing: 1966-10-28
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Granted: 1969-07-08
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Expires: 1986-10-28
Abstract
No abstract record available.
Inventors
- 👤 Hans Jorgen Jespersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:40
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/44; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6011; Y10T137/7504; Y10T137/7668; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759; Y10T137/86767
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1988966A
Cited
US2074839A
Cited
US3025873A
Cited
US3000393A
Cited
US3111136A
Cited
US3347260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |