US3521856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lined plug valve with means for sealing against leakage
Assignee: Xomox Corp
•
Filing: 1967-09-25
•
Granted: 1970-07-28
•
Expires: 1987-09-25
Abstract
No abstract record available.
Inventors
- 👤 Russell G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:14
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/16; F16K5/162; F16K5/163; F16K5/02; F16K5/0257; F16K5/0264; F16K5/0271; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4442
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1909303A
Cited
US3061267A
Cited
US3081974A
Cited
US3263697A
Cited
US3132838A
Cited
US3284089A
Cited
US4415488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |