US3676494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxylic acid amides
Assignee: BASF Schweiz AG
•
Filing: 1969-12-04
•
Granted: 1972-07-11
•
Expires: 1989-12-04
Abstract
Abstract The invention concerns new carboxylic acid amides of the formula WHEREIN M denotes a divalent bridge member of the series -S-, S-A-S- and -S-CH2-CH2-(O-CH2-CH2)p-S-, A denotes an alkylene residue containing one to 18 carbon atoms, p denotes an integer from one to three, R1 denotes an alkyl group and R2 denotes alkyl or hydrogen. These compounds are valuable antioxidants for polymers which are damaged by oxidative attacks.
Inventors
- 👤 Hans Rudolf Biland
- 👤 Max Duennenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/28; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/3725; C11; C11C; C11C3/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
A carboxylic acid amide according to claim 1, which corresponds to the formula wherein M1'' denotes a divalent bridge member -S-(CH2)q-S- or -S-CH2-CH2-O-CH2-CH2-S-, q denotes an integer from one to six, n denotes an integer from one to 12, R1 denotes an alkyl group with one to eight carbon atoms, R2 denotes hydrogen or an alkyl group with 1 to eight carbon atoms and R2'' denotes hydrogen or an alkyl group containing one to four carbon atoms; R2 and R2'' cannot simultaneously be different from hydrogen.
Claim 2
Dependent Claim
62 words
A carboxylic acid amide according to claim 1 which corresponds to the formula wherein M1 denotes a divalent bridge member -S-(CH2)q-S-, q denotes an integer from one to six, n denotes an integer from one to 12, R1 denotes an alkyl group with one to eight carbon atoms and R2 denotes hydrogen or an alkyl group with one to eight carbon atoms.
Claim 3
Dependent Claim
50 words
A carboxylic acid amide according to claim 1, which corresponds to the formula wherein M1 denotes a divalent bridge member -S-(CH2)q-S-, q denotes an integer from one to six, m denotes an integer from one to four and R3 denotes a branched alkyl group containing up to four carbon atoms.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |