US3450151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion and corrosion resistant valve construction and method
Assignee: DALE E HEUTZENROEDER
•
Filing: 1966-07-28
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Granted: 1969-06-17
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Expires: 1986-07-28
Abstract
No abstract record available.
Inventors
- 👤 Dale E Heutzenroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:02
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/06; F16K27/067; F16K5/00; F16K5/06; F16K5/0657; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3073336A
Cited
US2083091A
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US2533885A
Cited
US2407552A
Cited
US2801133A
Cited
US3334650A
Cited
US3284046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |