US3393702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outside bevel seat safety relief valve
Assignee: Dresser Industries Inc
•
Filing: 1965-02-23
•
Granted: 1968-07-23
•
Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Homer E Ferrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:42
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/08; F16K17/087; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K17/0433; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7744; Y10T137/7745; Y10T137/7747; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7923; Y10T137/7929; Y10T137/7938
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |