US2993504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball-type surface safety valve and pressure responsive pilot therefor
Assignee: Individual
•
Filing: 1958-09-08
•
Granted: 1961-07-25
•
Expires: 1978-09-08
Abstract
No abstract record available.
Inventors
- 👤 Phillip S Sizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:12
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/10; E; E21; E21B; E21B34/00; E21B34/02; F16K31/00; F16K31/44; F16K31/52; F16K31/524; F16K31/52458; F16K31/528; F16K31/5282; E21B2200/00; E21B2200/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3009; Y10T137/3012; Y10T137/7722; Y10T137/7723; Y10T137/7725
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2733729A
Cited
US1341319A
Cited
US2264677A
Cited
US2584847A
Cited
US2695037A
Cited
US2762396A
Cited
US2834371A
Cited
US2894715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |