US2582235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic resins from maleic anhydride-alkyl oleate adduct and an alkylene diamine
Assignee: Individual
•
Filing: 1948-07-16
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Granted: 1952-01-15
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Expires: 1968-07-16
Abstract
No abstract record available.
Inventors
- 👤 John C Cowan
- 👤 Howard M Teeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:27
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS COMPRISING REACTING AN ADDUCT WITH A SUBSTANTIALLY EQUIMOLECULAR PROPORTION OF AN ALKYLENE DIAMINE AT A TEMPERATURE OF 120* TO 225* C. UNTIL A FLEXIBLE, FUSIBLE, LINEAR POLYAMIDE IS FORMED, SAID ADDUCT BEING FORMED BY REACTING MALEIC ANHYDRIDE WITH A SUBSTANTIALLY PURE LOWER ALKYL OLEATE IN SUBSTANTIALLY EQUIMOLECULAR PROPORTIONS.
Claim 2
Dependent Claim
50 words
A PROCESS COMPRISING REACTING AN ADDUCT WITH A SUBSTANTIALLY EQUIMOLECULAR PROPORTION OF AN ALKYLENE DIAMINE AT A TEMPERATURE OF 120* TO 225* C. UNTIL A FLEXIBLE, FUSIBLE, LINEAR POLYAMIDE IS FORMED, SAID ADDUCT BEING FORMED BY REACTING MALEIC ANHYDRIDE WITH A SUBSTANTIALLY PURE LOWER ALKYL OLEATE IN SUBSTANTIALLY EQUIMOLECULAR PROPORTIONS.
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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |