Patent US2550682A successfully refreshed from Google Patents.
US2550682A
Expired / Lapsed
US
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Coating compositiions
Assignee: Individual
•
Filing: 1950-04-28
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Granted: 1951-05-01
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Expires: 1970-04-28
Abstract
No abstract record available.
Inventors
- 👤 Falkenburg Lee Bert
- 👤 Arthur J Lewis
- 👤 John C Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:46
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A LIQUID COATING COMPOSITION COMPRISING AN ALCOHOL SOLVENT AND A BASIC POLYAMIDE AS THE ESSENTIAL FILM-FORMING INGREDIENT DISSOLVED IN THE SOLVENT, SAID POLYAMIDE BEING THE REACTION PRODUCT OF POLYMERIC FAT ACIDS AND AN EXCESS OF ETHYLENE DIAMINE AND HAVING AN AMINE EQUIVALENT OF 1500 TO 2000.
Claim 2
Dependent Claim
46 words
A LIQUID COATING COMPOSITION COMPRISING AN ALCOHOL SOLVENT AND A BASIC POLYAMIDE AS THE ESSENTIAL FILM-FORMING INGREDIENT DISSOLVED IN THE SOLVENT, SAID POLYAMIDE BEING THE REACTION PRODUCT OF POLYMERIC FAT ACIDS AND AN EXCESS OF ETHYLENE DIAMINE AND HAVING AN AMINE EQUIVALENT OF 1500 TO 2000.
References Cited (Backward Citations)
US2379413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |