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Patent US2493521A successfully refreshed from Google Patents.
US2493521A
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Coupling device
Assignee: Texaco Inc
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Filing: 1946-06-20
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Granted: 1950-01-03
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Expires: 1966-06-20
Abstract
No abstract record available.
Inventors
- 👤 Jr James Allen Bermingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:06
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/20; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/06
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) | 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 |