US2518529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing synthetic lubricants
Assignee: STANDARD FRANCAISE DES PETROLES SA
•
Filing: 1949-01-18
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Granted: 1950-08-15
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Expires: 1969-01-18
Abstract
No abstract record available.
Inventors
- 👤 Casson Roger Boux De
- 👤 Hemmer Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:15
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C10; C10M; C10M169/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2138775A
Cited
US2141593A
Cited
US2410885A
Cited
US2435483A
Cited
US2413161A
Cited
US2456119A
Cited
US2475970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |