Patent US3493044A successfully refreshed from Google Patents.
US3493044A
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Pressure relief system
Assignee: Union Oil Company of California
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Filing: 1968-03-15
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Granted: 1970-02-03
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Expires: 1988-03-15
Abstract
No abstract record available.
Inventors
- 👤 Eugene A Selph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:08
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/12; E; E21; E21B; E21B34/00; E21B34/16; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/03; F17C2201/035; F17C2205/00; F17C2205/01; F17C2205/0153; F17C2205/018; F17C2205/03; F17C2205/0302; F17C2205/0311; F17C2205/0314; F17C2205/0323; F17C2205/0326; F17C2205/0329; F17C2205/0332; F17C2205/0335; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/0443; F17C2250/07; F17C2250/072; F17C2260/00; F17C2260/02; F17C2260/021; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714
Claims Analysis
Total Claims: 0
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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) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |