US2832740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1954-12-20
•
Granted: 1958-04-29
•
Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 William David Garden
- 👤 James Sinclair Mcfarlane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:21
CPC Classifications
C; C10; C10M; C10M3/00; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/10; C10M2201/102; C10M2201/105; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2215/00; C10M2215/22; C10M2215/225; C10M2215/227; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10M2229/05; C10M2229/051; C10M2229/052; C10N; C10N2010/00; C10N2010/02; C10N2020/00; C10N2020/01; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST ONE LIQUID ORGANOPOLYSILOXANE AND A MINOR PROPORTION, NOT EXCEEDING ABOUT 5% BY WEIGHT OF THE POLYSILOXANE, OF AT LEAST ONE DERIVATIVE OF ORTHOPHOSPHORIC ACID WHEREIN, ONE HYDROGEN ATOM ONLY IS REPLACED BY A PARATERT.OCTYLPHENYL GROUP AND WHEREIN AT LEAST ONE OF TWO OTHER HYDROGEN ATOMS IS REPLACED BY A NON-UNSATURATED ORGANO GROUP CONTAINING ONLY CARBON AND HYDROGEN AND HAVING NOT MORE THAN 9 HYDROGEN ATOMS.
Claim 2
Dependent Claim
73 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST ONE LIQUID ORGANOPOLYSILOXANE AND A MINOR PROPORTION, NOT EXCEEDING ABOUT 5% BY WEIGHT OF THE POLYSILOXANE, OF AT LEAST ONE DERIVATIVE OF ORTHOPHOSPHORIC ACID WHEREIN, ONE HYDROGEN ATOM ONLY IS REPLACED BY A PARATERT.OCTYLPHENYL GROUP AND WHEREIN AT LEAST ONE OF TWO OTHER HYDROGEN ATOMS IS REPLACED BY A NON-UNSATURATED ORGANO GROUP CONTAINING ONLY CARBON AND HYDROGEN AND HAVING NOT MORE THAN 9 HYDROGEN ATOMS.
References Cited (Backward Citations)
US2340331A
Cited
US2684336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |