US3536092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat insert for gas handling equipment
Assignee: Air Products and Chemicals Inc
•
Filing: 1967-11-13
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Granted: 1970-10-27
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Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 George A Klasson
- 👤 Justin W Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:54
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/42; F16K1/425; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/6167; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7822; Y10T137/7823; Y10T137/7826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |