Patent US3725480A successfully refreshed from Google Patents.
US3725480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ashless oil additives
Assignee: BP Corp North America Inc
•
Filing: 1970-10-15
•
Granted: 1973-04-03
•
Expires: 1990-10-15
Abstract
Abstract This invention concerns the condensation product of an aldehyde reactant having more than one carbon atom and/or ketone reactant, formaldehyde, an alkylene polyamine, and an alkyl-substituted phenol. These compositions can be used as ashless alkaline additives for lubricating oils.
Inventors
- 👤 T Traise
- 👤 R Watson
- 👤 R Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:21
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/74; C10; C10M; C10M159/00; C10M159/12; C10M159/16; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/14; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
The condensation product defined in claim 1 wherein the formaldehyde, polyamine, substituted phenol and the aldehyde reactant and/or ketone reactant are reacted in the respective molar ratios of about 1-2:1-2:1:1-4.
Claim 2
Dependent Claim
21 words
The composition defined in claim 2 wherein the alkyl substituent of the alkyl-substituted phenol contains from one to 18 carbon atoms.
References Cited (Backward Citations)
US2336006A
Cited
US2511063A
Cited
US2962442A
Cited
US3351662A
Cited
US3368972A
Cited
US3413347A
Cited
US3448047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |