US3418281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable amino-substituted aromatic aldehyde resins and process of making same
Assignee: Dow Chemical Co
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Filing: 1964-01-27
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Granted: 1968-12-24
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Expires: 1984-01-27
Abstract
No abstract record available.
Inventors
- 👤 Harry A Smith
- 👤 William K Carrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:52
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/14; C08G73/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
A FILM-FORMING POLYMER RESIN HAVING SOFTENING POINT IN THE RANGE FROM 115* TO 350*C. AND THE CONJUGATED STRUCTURE H2=(=N-X-CH=)N=O WHEREIN N IS A POLYMERIC NUMBER AND -X- IS DEFINED BELOW, OBTAINED BY HEATING AN AMINO-SUBSTITUTED AROMATIC ALDEHYDE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
41 words
A FILM-FORMING POLYMER RESIN HAVING SOFTENING POINT IN THE RANGE FROM 115* TO 350*C. AND THE CONJUGATED STRUCTURE H2=(=N-X-CH=)N=O WHEREIN N IS A POLYMERIC NUMBER AND -X- IS DEFINED BELOW, OBTAINED BY HEATING AN AMINO-SUBSTITUTED AROMATIC ALDEHYDE HAVING THE GENERAL FORMULA
Claim 3
Dependent Claim
70 words
A PROCESS FOR PRODUCING FILM FORMING SYNTHETIC POLYMER RESINS HAVING HIGH SOFTENING POINTS IN THE RANGE FROM 115* TO 350*C. AND THE CONJUGATED STRUCTURE H2=(=N-X-CH=)N=O WHEREIN N IS A POLYMERIC NUMBER AND -X- IS DEFINED BELOW, WHICH COMPRISES HEATING AT A TEMPERATURE OF FROM ABOUT 25* TO ABOUT 250*C., FOR AT LEAST 3 HOURS, AND IN THE PRESENCE OF AN IONIC CATALYST, AN AMINO-SUBSTITUTED AROMATIC ALDEHYDE HAVING THE GENERAL FORMULA
Claim 4
Dependent Claim
70 words
A PROCESS FOR PRODUCING FILM FORMING SYNTHETIC POLYMER RESINS HAVING HIGH SOFTENING POINTS IN THE RANGE FROM 115* TO 350*C. AND THE CONJUGATED STRUCTURE H2=(=N-X-CH=)N=O WHEREIN N IS A POLYMERIC NUMBER AND -X- IS DEFINED BELOW, WHICH COMPRISES HEATING AT A TEMPERATURE OF FROM ABOUT 25* TO ABOUT 250*C., FOR AT LEAST 3 HOURS, AND IN THE PRESENCE OF AN IONIC CATALYST, AN AMINO-SUBSTITUTED AROMATIC ALDEHYDE HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |