US3011972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of an oxidation stable bright stock
Assignee: Sinclair Refining Co
•
Filing: 1957-02-25
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Granted: 1961-12-05
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Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 William B Watson
- 👤 Maurice K Rausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:47
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003; C10G2400/00; C10G2400/10
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) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |