Patent US4035171A successfully refreshed from Google Patents.
Patent US3341573A successfully refreshed from Google Patents.
US3341573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide esters for hydraulic fluids and method of making the same
Assignee: R M HOLLINGSHEAD CORP
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Filing: 1963-06-05
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Granted: 1967-09-12
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Expires: 1983-06-05
Abstract
No abstract record available.
Inventors
- 👤 Jr William J Shibe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:43
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; C10; C10M; C10M3/00; C10M2201/00; C10M2201/02; C10M2217/00; C10M2217/02; C10M2217/04; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A POLYAMIDE ESTER PREPARED BY THE PROCESS OF CONTACTING AND REACTIN APPROXIMATELY EQUI-MOLAR PORTIONS OF INGREDIENTS (1) AND (2), WHEREIN INGREDIENT (1) IS A POLYGLYCOL AMINE HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF NH2(CH2CH2O)MH WHERE M IS AN INTEGER FROM 2 TO 45 AND NH2((CH2CH(CH3)O)MH WHERE M IS AN INTEGER FROM 2 TO 45, AND INGREDIENT (2) IS A DIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF ACIDS OF THE FORMULA HOOC(CH2)NCOOH WHERE N IS AN INTEGER FROM 1 TO 10, PHTHALIC, ISOPHTHALIC, PYROMELLITIC AND BICYCLO (2,2,1) HEPTANE 5-DICARBOXYLIC ACIDS, AND THE ANHYDRIDES OF ALL SAID ACIDS.
Claim 2
Dependent Claim
99 words
A POLYAMIDE ESTER PREPARED BY THE PROCESS OF CONTACTING AND REACTIN APPROXIMATELY EQUI-MOLAR PORTIONS OF INGREDIENTS (1) AND (2), WHEREIN INGREDIENT (1) IS A POLYGLYCOL AMINE HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF NH2(CH2CH2O)MH WHERE M IS AN INTEGER FROM 2 TO 45 AND NH2((CH2CH(CH3)O)MH WHERE M IS AN INTEGER FROM 2 TO 45, AND INGREDIENT (2) IS A DIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF ACIDS OF THE FORMULA HOOC(CH2)NCOOH WHERE N IS AN INTEGER FROM 1 TO 10, PHTHALIC, ISOPHTHALIC, PYROMELLITIC AND BICYCLO (2,2,1) HEPTANE 5-DICARBOXYLIC ACIDS, AND THE ANHYDRIDES OF ALL SAID ACIDS.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |