Patent US2956968A successfully refreshed from Google Patents.
US2956968A
Expired / Lapsed
US
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Modified polyamide resins
Assignee: Beck Koller and Company England Ltd
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Filing: 1956-02-02
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Granted: 1960-10-18
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Expires: 1976-02-02
Abstract
No abstract record available.
Inventors
- 👤 Swann Geoffrey
- 👤 Evans Peter Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:53
CPC Classifications
C; C08; C08L; C08L77/00; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34; C08G69/48; C08G69/50; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS FOR THE PRODUCTION OF FORMALDEHYDE MODIFIED POLYAMIDE RESINS SOLUBLE IN ORGANIC SOLVENTS AND SUITABLE FOR FURTHER REACTION WITH IMCOMPLETELY CONDENSED PHENOL FORMALDEHYDE CONDENSATION PRODUCTS AND WITH EPOXY RESINS CONTAINING TERMINAL EPOXY GROUPS, WHICH PROCESS COMPRISES COMPLETELY REACTING BY HEATING TO REACTION TEMPERATURE (1) A MEMBER OF A GROUP CONSISTING OF FORMALDEHYDE AND SUBSTANCES CAPABLE OF YIELDING FORMALDEHYDE UNDER THE CONDITIONS OF THE REACTION, (2) A DIMERIC FATTY ACID CONTAINING TWO CARBOXYL GROUPS ONLY AND AT LEAST 36 CARBON ATOMS IN THE MOLECULE, AND (3) A MONOMERIC ALIPHATIC TRIAMINE, IN THE PROPORTIONS OF 0.1 TO 5 MOLES OF FORMALDEHYDE AND .5-1 MOLE DIMERIC FATTY ACID PER MOLE OF TRIAMINE, CONTINUING HEATING UNTIL THE REACTION IS COMPLETED AS LONG AS WATER OF CONDENSATION IS BEING FORMED, AND REMOVING THE WATER OF CONDENSATION FROM THE SO FORMED FORMALDEHYDE MODIFIED POLYAMIDE RESIN.
Claim 2
Dependent Claim
140 words
A PROCESS FOR THE PRODUCTION OF FORMALDEHYDE MODIFIED POLYAMIDE RESINS SOLUBLE IN ORGANIC SOLVENTS AND SUITABLE FOR FURTHER REACTION WITH IMCOMPLETELY CONDENSED PHENOL FORMALDEHYDE CONDENSATION PRODUCTS AND WITH EPOXY RESINS CONTAINING TERMINAL EPOXY GROUPS, WHICH PROCESS COMPRISES COMPLETELY REACTING BY HEATING TO REACTION TEMPERATURE (1) A MEMBER OF A GROUP CONSISTING OF FORMALDEHYDE AND SUBSTANCES CAPABLE OF YIELDING FORMALDEHYDE UNDER THE CONDITIONS OF THE REACTION, (2) A DIMERIC FATTY ACID CONTAINING TWO CARBOXYL GROUPS ONLY AND AT LEAST 36 CARBON ATOMS IN THE MOLECULE, AND (3) A MONOMERIC ALIPHATIC TRIAMINE, IN THE PROPORTIONS OF 0.1 TO 5 MOLES OF FORMALDEHYDE AND .5-1 MOLE DIMERIC FATTY ACID PER MOLE OF TRIAMINE, CONTINUING HEATING UNTIL THE REACTION IS COMPLETED AS LONG AS WATER OF CONDENSATION IS BEING FORMED, AND REMOVING THE WATER OF CONDENSATION FROM THE SO FORMED FORMALDEHYDE MODIFIED POLYAMIDE RESIN.
References Cited (Backward Citations)
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US2389079A
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US2518148A
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US2630395A
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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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |