US3018797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: Delaware Capital Formation Inc
•
Filing: 1958-07-28
•
Granted: 1962-01-30
•
Expires: 1978-07-28
Abstract
No abstract record available.
Inventors
- 👤 Asbury S Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:15
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/10; F16K11/14; F16K11/16; F16K11/161; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US962516A
Cited
US1114360A
Cited
US2160536A
Cited
US2227542A
Cited
US2703105A
Cited
US2665711A
Cited
US2825361A
Cited
US2892608A
Cited
US2883145A
Cited
US2942622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |