US2830037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly
Assignee: EIDP Inc
•
Filing: 1953-06-30
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Granted: 1958-04-08
•
Expires: 1973-06-30
Abstract
No abstract record available.
Inventors
- 👤 Albert S Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:12
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614; C08G18/7621; C08G18/08; C08G18/0838; C08G18/0842; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/4854; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN THE PROCESS OF PREPARING ELASTOMERS BY REACTING A POLYTETRAMETHYLENE ETHER GLYCOL HAVING A MOLECULAR WEIGHT OF FROM 750 TO 4000 WITH A MOLE EXCESS OF 2,4TOLYLENE DISSCOYANATE AND REACTING THE RESULTING ISOCYANATE-TERMINETAD PRODUCT WITH WATER, THE STEP WHICH COMPRISES CARYING OUT SAID REACTIONS IN AN INERT ALIPHATIC HYDROCARBON SOLVENT IN WHICH THE RESULTING ELASTOMER IS INSOLUBLE, SAID SOLVENT FROM 6 TO 12 CARBON ATOMS.
Claim 2
Dependent Claim
65 words
IN THE PROCESS OF PREPARING ELASTOMERS BY REACTING A POLYTETRAMETHYLENE ETHER GLYCOL HAVING A MOLECULAR WEIGHT OF FROM 750 TO 4000 WITH A MOLE EXCESS OF 2,4TOLYLENE DISSCOYANATE AND REACTING THE RESULTING ISOCYANATE-TERMINETAD PRODUCT WITH WATER, THE STEP WHICH COMPRISES CARYING OUT SAID REACTIONS IN AN INERT ALIPHATIC HYDROCARBON SOLVENT IN WHICH THE RESULTING ELASTOMER IS INSOLUBLE, SAID SOLVENT FROM 6 TO 12 CARBON ATOMS.
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |