US2441023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions containing polymerized allyl esters of carboxylic acids
Assignee: Shell Development Co
•
Filing: 1945-01-26
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Granted: 1948-05-04
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Expires: 1965-01-26
Abstract
No abstract record available.
Inventors
- 👤 Robert G Larsen
- 👤 Kenneth E Marple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:35
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F18/00; C08F18/02; C08F18/12; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2213/00; C10M2213/04; C10M2213/06; C10N; C10N2040/00; C10N2040/08; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |