US2668630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Union Oil Company of California
•
Filing: 1951-01-16
•
Granted: 1954-02-09
•
Expires: 1971-01-16
Abstract
No abstract record available.
Inventors
- 👤 Ertl Tell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:28
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34; E02F3/352; E02F3/342; E02F3/348; E02F3/3486
Claims Analysis
Total Claims: 0
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US2507548A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |