US2883359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic products of high molecular weight
Assignee: Bayer AG
•
Filing: 1954-04-21
•
Granted: 1959-04-21
•
Expires: 1974-04-21
Abstract
No abstract record available.
Inventors
- 👤 Karl E Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:18
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7678; C08G18/08; C08G18/10; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/3287; C08G18/329
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A PROCESS OF FORMING A HIGH MOLECULAR WEIGHT CROSS-LINKED POLYMER BY REACTING AN ORGANIC DIISOCYANATE WITH A CROSS-LINKING GLYCOL AND AN ANHYDROUS ORGANIC LINEAR POLYESTER HAVING FROM 0.6-2.4% BY WEIGHT OF HYDROXYL GROUPS AND AN ACID VALUE SUBSTANTIALLY NOT EXCEEDING 1, SAID POLYESTER BEING PREPARED SUBSTANTIALLY FROM AN ALIPHATIC DICARBOXYLIC ACID AND AN ALIPHATIC GLYCOL, THE IMPROVEMENT COMPRISING EMPLOYING AS THE CROSS-LINKING GLYCOL IN THE FORMATION OF SAID CROSS-LINKED PRODUCT ONE WHICH WILL ACCELERATE THE CROSS-LINKING REACTION, SAID GLYCOL CONTAINING A TERTIARY NITROGEN ATOM AND BEING SELECTED FROM THE GROUP CONSISTING OF DIHYDROXYETHYL ANILINE, DIHYDROXYETHYL NAPHTHYLAMINE, DIHYDROXYETHYL CYCLOHEXYLAMINE, AND METHYL DIETHANOLAMINE.
Claim 2
Dependent Claim
102 words
IN A PROCESS OF FORMING A HIGH MOLECULAR WEIGHT CROSS-LINKED POLYMER BY REACTING AN ORGANIC DIISOCYANATE WITH A CROSS-LINKING GLYCOL AND AN ANHYDROUS ORGANIC LINEAR POLYESTER HAVING FROM 0.6-2.4% BY WEIGHT OF HYDROXYL GROUPS AND AN ACID VALUE SUBSTANTIALLY NOT EXCEEDING 1, SAID POLYESTER BEING PREPARED SUBSTANTIALLY FROM AN ALIPHATIC DICARBOXYLIC ACID AND AN ALIPHATIC GLYCOL, THE IMPROVEMENT COMPRISING EMPLOYING AS THE CROSS-LINKING GLYCOL IN THE FORMATION OF SAID CROSS-LINKED PRODUCT ONE WHICH WILL ACCELERATE THE CROSS-LINKING REACTION, SAID GLYCOL CONTAINING A TERTIARY NITROGEN ATOM AND BEING SELECTED FROM THE GROUP CONSISTING OF DIHYDROXYETHYL ANILINE, DIHYDROXYETHYL NAPHTHYLAMINE, DIHYDROXYETHYL CYCLOHEXYLAMINE, AND METHYL DIETHANOLAMINE.
References Cited (Backward Citations)
US2621166A
Cited
US2729618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |