US2837498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xylylene diisocyanate modified polyesters
Assignee: California Research LLC
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Filing: 1954-10-04
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Granted: 1958-06-03
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Louis L Ferstandig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:21
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4236; C08G18/4238; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614; C08G18/7628; C08G18/7642
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN THE PROCESS OF PREPARING A DIISOCYANATE MODIFIED POLYESTER USEFUL AS A SYNETHIC RUBBER PRODUCT, WHICH INVOLVES FIRST ESTERIFYING A GYLCOL AND DIBASIC CARBOXYLIC ACID TO PRODUCE A POLYSTER HAVING AN ACID NUMBER BELOW ABOUT 10 AND A HYDROXYL NUMBER BETWEEN ABOUT 20 AND 80, FOLLOWED BY REACTION OF THE POLYESTER WITH A DIISOCYANATE TO PRODUCE AN INTERMIDIATE STAGE DIISOCYANATE MODIFIED POLYESTER EXISTING IN A FUSIBLE, DEFORMABLE STATE, THE IMPROVEMENT OF PROLONGING THE EXISTENCE OF THE FUSIBLE, DEFORMABLE STATE OF SAID DIISOCYANATE MODIFIED POLYESTER, WHICH COMPRISES EMPLOYING AS THE DISOCYANATE A 5-ALKYL1.3-XYLENE DIISOCYANATE IN WHICH THE ALKYL GROUP CONTAINS 1 TO 8 CARBON ATOMS.
Claim 2
Dependent Claim
104 words
IN THE PROCESS OF PREPARING A DIISOCYANATE MODIFIED POLYESTER USEFUL AS A SYNETHIC RUBBER PRODUCT, WHICH INVOLVES FIRST ESTERIFYING A GYLCOL AND DIBASIC CARBOXYLIC ACID TO PRODUCE A POLYSTER HAVING AN ACID NUMBER BELOW ABOUT 10 AND A HYDROXYL NUMBER BETWEEN ABOUT 20 AND 80, FOLLOWED BY REACTION OF THE POLYESTER WITH A DIISOCYANATE TO PRODUCE AN INTERMIDIATE STAGE DIISOCYANATE MODIFIED POLYESTER EXISTING IN A FUSIBLE, DEFORMABLE STATE, THE IMPROVEMENT OF PROLONGING THE EXISTENCE OF THE FUSIBLE, DEFORMABLE STATE OF SAID DIISOCYANATE MODIFIED POLYESTER, WHICH COMPRISES EMPLOYING AS THE DISOCYANATE A 5-ALKYL1.3-XYLENE DIISOCYANATE IN WHICH THE ALKYL GROUP CONTAINS 1 TO 8 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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |