US2813899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric dicarboxylic acids and derivatives
Assignee: EIDP Inc
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Filing: 1956-02-09
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Granted: 1957-11-19
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Expires: 1976-02-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Alfred Coles Haven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:03
CPC Classifications
C; C07; C07C; C07C57/00; C07C57/30; C07C57/34; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/6705; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A DIFUNCTIONAL COMPOUND OF THE GENERAL FORMULA X-C-(A-B)M-A-C-X, WHEREIN X IS A CARBOXYL GROUP; M IS AN INTEGER FROM 1 TO 4; A IS A DIRADICAL FORMED BY REMOVING ONE HYDROGEN FROM EACH RING OF A GEM DIPHENYLALKANE HAVING 1 TO 10 CARBON ATOMS IN THE ALKYLIDENE RADICAL; B IS A C6 TO C21 ALKYLENE RADICAL HAVING AT LEAST THREE CARBON ATOMS IN THE BIVALENT ALKYLENE UNIT, AND C IS A C3 TO C17 ALKYLENE RADICAL HAVING AT LEAST THREE CARBON ATOMS IN ITS BIVALENT ALKYLENE UNIT.
Claim 2
Dependent Claim
87 words
A DIFUNCTIONAL COMPOUND OF THE GENERAL FORMULA X-C-(A-B)M-A-C-X, WHEREIN X IS A CARBOXYL GROUP; M IS AN INTEGER FROM 1 TO 4; A IS A DIRADICAL FORMED BY REMOVING ONE HYDROGEN FROM EACH RING OF A GEM DIPHENYLALKANE HAVING 1 TO 10 CARBON ATOMS IN THE ALKYLIDENE RADICAL; B IS A C6 TO C21 ALKYLENE RADICAL HAVING AT LEAST THREE CARBON ATOMS IN THE BIVALENT ALKYLENE UNIT, AND C IS A C3 TO C17 ALKYLENE RADICAL HAVING AT LEAST THREE CARBON ATOMS IN ITS BIVALENT ALKYLENE UNIT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |