US3370009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon lubricating oil of improved viscosity index containing methacrylate graft copolymers
Assignee: Texaco Inc
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Filing: 1965-12-23
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Granted: 1968-02-20
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Expires: 1985-12-23
Abstract
No abstract record available.
Inventors
- 👤 Morduchowitz Abraham
- 👤 Jr John T Nolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:40
CPC Classifications
C; C10; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C08; C08F; C08F265/00; C08F265/04; C08F265/06; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR PORTION OF A HYDROCARBON LUBRICATING OIL AND A MINOR PORTION SUFFICIENT TO IMPROVE THE VISCOSITY INDEX OF SAID OIL OF A GRAFT COPOLYMER PREPARED BY OXIDIZING A HOMOPOLYMER OF A FIRST ESTER MONOMER TO THE CORRESPONDING HYDROPEROXIDE, SAID FIRST MONOMER HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
50 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR PORTION OF A HYDROCARBON LUBRICATING OIL AND A MINOR PORTION SUFFICIENT TO IMPROVE THE VISCOSITY INDEX OF SAID OIL OF A GRAFT COPOLYMER PREPARED BY OXIDIZING A HOMOPOLYMER OF A FIRST ESTER MONOMER TO THE CORRESPONDING HYDROPEROXIDE, SAID FIRST MONOMER HAVING THE GENERAL FORMULA:
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |