US3288754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon modified polyamide-polyimide polymers
Assignee: Dow Silicones Corp
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Filing: 1963-12-12
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Granted: 1966-11-29
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Expires: 1983-12-12
Abstract
No abstract record available.
Inventors
- 👤 Donald E Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:25
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48; C08G69/42; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; C08G73/14; C08G77/00; C08G77/42; C08G77/452; C08G77/455
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF AN ORGANO SILICON-MODIFIED POLYAMIDE-POLYMIDE PREPARED BY REACTING (I) 45 TO 99 INCLUSIVE WEIGHT PERCENT, BASED ON THE TOTAL WEIGHT OF (I) AND (II), OF AN ORGANIC SOLVENT SOLUBLE POLYAMIDE-POLYIMIDE PREPOLYMER FORMED BY REACTING (A) FROM 45 TO 55 INCLUSIVE MOL PERCENT OF AT LEAST ONE CARBOCYCLIC AROMATIC COMPOUND, CONTAINING ATOMS SELECTED FROM THE GROUP CONSISTING OF CARBON, HYDROGEN, OXYGEN AND SULFUR, AND SELECTED FROM THE GROUP CONSISTING OF AROMATIC ACIDS, AROMATIC ESTERS AND AROMATIC ANHYDRIDES, HAVING AT LEAST THREE CARBONYL-CONTAINING GROUPS PER MOLECULE SELECTED FROM THE GROUP CONSISTING OF CARBOXYL GROUPS, -COOH; ESTER GROUPS, -COOR'' IN WHICH R'' IS A MONOVALENT HYDROCARBON RADICAL; AND ANHYDRIDE GROUPS,
Claim 2
Dependent Claim
113 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF AN ORGANO SILICON-MODIFIED POLYAMIDE-POLYMIDE PREPARED BY REACTING (I) 45 TO 99 INCLUSIVE WEIGHT PERCENT, BASED ON THE TOTAL WEIGHT OF (I) AND (II), OF AN ORGANIC SOLVENT SOLUBLE POLYAMIDE-POLYIMIDE PREPOLYMER FORMED BY REACTING (A) FROM 45 TO 55 INCLUSIVE MOL PERCENT OF AT LEAST ONE CARBOCYCLIC AROMATIC COMPOUND, CONTAINING ATOMS SELECTED FROM THE GROUP CONSISTING OF CARBON, HYDROGEN, OXYGEN AND SULFUR, AND SELECTED FROM THE GROUP CONSISTING OF AROMATIC ACIDS, AROMATIC ESTERS AND AROMATIC ANHYDRIDES, HAVING AT LEAST THREE CARBONYL-CONTAINING GROUPS PER MOLECULE SELECTED FROM THE GROUP CONSISTING OF CARBOXYL GROUPS, -COOH; ESTER GROUPS, -COOR'' IN WHICH R'' IS A MONOVALENT HYDROCARBON RADICAL; AND ANHYDRIDE GROUPS,
References Cited (Backward Citations)
US3179632A
Cited
US3179630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |