US2930774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cresylic acid resin-polyamide varnish
Assignee: Richardson Co
•
Filing: 1956-04-27
•
Granted: 1960-03-29
•
Expires: 1976-04-27
Abstract
No abstract record available.
Inventors
- 👤 Honnen Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:01
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/24; C08L; C08L77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A COMPOSITION OF MATTER CAPABLE OF BEING HARDENED UNDER HEAT AND PRESSURE CONSISTING ESSENTIALLY OF BETWEEN ABOUT 55-70 PERCENT OF A POLYAMIDE DERIVED FROM THE REACTION OF A DIAMINE WITH A DICARBOXYLIC ACID, AND BETWEEN ABOUT 45-30 PERCENT OF A CRESYLIC ACID-FORMALDEHYDE CONDENSATION PRODUCT DERIVED FROM A CRESYLIC ACID COMPRISING PREDOMINANTLY META AND PARA CRESOLS AND XYLENOLS, WHEREIN AT LEAST THIRTY PERCENT OF THE CRESOL CONTENT IS META CRESOL AND THE REMAINDER TO THE CRESOLS CONSISTS PREDOMINANTLY OF PARA CRESOL AND WHEREIN NOT MORE THAN TWELVE PERCENT OF THE XYLENOLS ARE 3,4 OR 3,5 XYLENOLS, THE REMAINDER OF THE XYLENOLS PRESENT HAVING A BOILING POINT BELOW SAID 3,4-3,5 XYLENOLS, SAID CONDENSATION PRODUCT CONTAINING A MAXIMUM OF ABOUT 1.5 PERCENT FREE FORMALDEHYDE.
Claim 2
Dependent Claim
121 words
A COMPOSITION OF MATTER CAPABLE OF BEING HARDENED UNDER HEAT AND PRESSURE CONSISTING ESSENTIALLY OF BETWEEN ABOUT 55-70 PERCENT OF A POLYAMIDE DERIVED FROM THE REACTION OF A DIAMINE WITH A DICARBOXYLIC ACID, AND BETWEEN ABOUT 45-30 PERCENT OF A CRESYLIC ACID-FORMALDEHYDE CONDENSATION PRODUCT DERIVED FROM A CRESYLIC ACID COMPRISING PREDOMINANTLY META AND PARA CRESOLS AND XYLENOLS, WHEREIN AT LEAST THIRTY PERCENT OF THE CRESOL CONTENT IS META CRESOL AND THE REMAINDER TO THE CRESOLS CONSISTS PREDOMINANTLY OF PARA CRESOL AND WHEREIN NOT MORE THAN TWELVE PERCENT OF THE XYLENOLS ARE 3,4 OR 3,5 XYLENOLS, THE REMAINDER OF THE XYLENOLS PRESENT HAVING A BOILING POINT BELOW SAID 3,4-3,5 XYLENOLS, SAID CONDENSATION PRODUCT CONTAINING A MAXIMUM OF ABOUT 1.5 PERCENT FREE FORMALDEHYDE.
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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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |