Patent US2855372A successfully refreshed from Google Patents.
US2855372A
Expired / Lapsed
US
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Ureamide-epoxide compositions
Assignee: North American Aviation Corp
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Filing: 1956-08-24
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Granted: 1958-10-07
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Expires: 1976-08-24
Abstract
No abstract record available.
Inventors
- 👤 Robert W Jenkins
- 👤 Giles A Plew
- 👤 Katz Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:37
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4021; C08L; C08L63/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF (1) AN ACID AMIDE OBTAINED BY HEATING A DICARBOXYLIC ORGANIC ACID HAVING AN AVERAGE OF AT LEAST ONE FREE CARBOXYL GROUP PER MOLECULE, WITH A UREA HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
37 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF (1) AN ACID AMIDE OBTAINED BY HEATING A DICARBOXYLIC ORGANIC ACID HAVING AN AVERAGE OF AT LEAST ONE FREE CARBOXYL GROUP PER MOLECULE, WITH A UREA HAVING THE GENERAL FORMULA
Claim 3
Dependent Claim
30 words
THE PROCESS OF PRODUCING A UREAMIDE-EPOXIDE COPOLYMER COMPRISING HEATING (1) A DIBASIC AMIDE OBTAINED BY HEATING A FATTY ACID HAVING TWO CARBOXYL GROUPS WITH A URE HAVING THE GENERAL FORMULA
Claim 4
Dependent Claim
30 words
THE PROCESS OF PRODUCING A UREAMIDE-EPOXIDE COPOLYMER COMPRISING HEATING (1) A DIBASIC AMIDE OBTAINED BY HEATING A FATTY ACID HAVING TWO CARBOXYL GROUPS WITH A URE HAVING THE GENERAL FORMULA
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |