US2493556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supporting and sealing member
Assignee: Standard Oil Development Co
•
Filing: 1947-12-20
•
Granted: 1950-01-03
•
Expires: 1967-12-20
Abstract
No abstract record available.
Inventors
- 👤 Albert L Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:47
CPC Classifications
F; F16; F16L; F16L5/00; F16L5/02; F16L5/08; E; E21; E21B; E21B19/00; E21B19/10; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3969; Y10T24/3978; Y10T403/00; Y10T403/49; Y10T403/4958
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1730622A
Cited
US1942366A
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US1914741A
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US1923283A
Cited
US2083089A
Cited
US2264480A
Cited
US2287205A
Cited
US2252240A
Cited
US2289696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |