US2856375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-forming polyesters of bisacetoxymethyl durene
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-08-27
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Granted: 1958-10-14
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Expires: 1974-08-27
Abstract
No abstract record available.
Inventors
- 👤 Louis A Mikeska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:36
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A RESINOUS CONDENSATION PRODUCT COMPRISING A POLYESTER OF BIS-ACETOXYMETHYL DURENE AND OF A SATURATED C4 TO C10 DICARBOXYLIC ACID, HEATED TOGETHER IN ABOUT EQUILMOLAR AMOUNTS TO A TEMPERATURE AT WHICH CONDENSATION OCCURS WITH CONTINUED HEATING OF THE RESULTING POLYESTER UNTIL IT IS POLYMERIZED INTO A NORMALLY SOLID HIGH-MELTING RESIN.
Claim 2
Dependent Claim
49 words
A RESINOUS CONDENSATION PRODUCT COMPRISING A POLYESTER OF BIS-ACETOXYMETHYL DURENE AND OF A SATURATED C4 TO C10 DICARBOXYLIC ACID, HEATED TOGETHER IN ABOUT EQUILMOLAR AMOUNTS TO A TEMPERATURE AT WHICH CONDENSATION OCCURS WITH CONTINUED HEATING OF THE RESULTING POLYESTER UNTIL IT IS POLYMERIZED INTO A NORMALLY SOLID HIGH-MELTING RESIN.
References Cited (Backward Citations)
US2437232A
Cited
US2621168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |