Patent US2617786A successfully refreshed from Google Patents.
US2617786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide resins from dinitriles and formaldehyde
Assignee: Monsanto Chemicals Ltd
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Filing: 1947-12-30
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Granted: 1952-11-11
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Expires: 1967-12-30
Abstract
No abstract record available.
Inventors
- 👤 David T Mowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:13
CPC Classifications
C; C08; C08G; C08G69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A METHOF OF PREPARING WATER-INSOLUBLE LINEAR POLYAMIDE RESINS WHICH COMPRISES MIXING A DINITRILE HAVING THE STRUCTURAL FORMULA: NC-R-CN, WHEREIN-R-IS A DIVALENT RADICAL HAVING A CHAIN OF FROM TWO TO 12 ATOMS BETWEEN THE VALENCE BONDS AND IS SELECTED FROM A GROUP CONSISTING OF SATURATED ALIPHATIC HYDROCARBON RADICALS, AROMATIC HYDROCARBON RADICALS, HYDROCARBON RADICALS CONTAINING BOTH SATURATED ALIPHATIC AND AROMATIC STRUCTURES, AND THE OXAAND THIA-HYDROCARBON RADICALS WHEREIN EACH OXYGEN AND SULFUR ATOM IS LOCATED IN AN ALIPHATIC CHAIN BETWEEN TWO METHYLENE RADICALS, BOTH ADJACENT TO THE SAID ATOM, WITH APPROXIMATELY ONE MOLECULAR WEIGHT OF FORMALDEHYDE PER MOLE OF DINITRILE IN THE PRESENCE OF AN ACID CATALYST AT LEAST AS STRONG AS PHOSPORIC ACID TO FORM A CONDENSATION POLYMER OF THE DINITRILE AND FORMALDEHYDE AND THEREAFTERSUBJECTING THE RESULTING COMPOUND TO THE ACTION OF WATER.
Claim 2
Dependent Claim
131 words
A METHOF OF PREPARING WATER-INSOLUBLE LINEAR POLYAMIDE RESINS WHICH COMPRISES MIXING A DINITRILE HAVING THE STRUCTURAL FORMULA: NC-R-CN, WHEREIN-R-IS A DIVALENT RADICAL HAVING A CHAIN OF FROM TWO TO 12 ATOMS BETWEEN THE VALENCE BONDS AND IS SELECTED FROM A GROUP CONSISTING OF SATURATED ALIPHATIC HYDROCARBON RADICALS, AROMATIC HYDROCARBON RADICALS, HYDROCARBON RADICALS CONTAINING BOTH SATURATED ALIPHATIC AND AROMATIC STRUCTURES, AND THE OXAAND THIA-HYDROCARBON RADICALS WHEREIN EACH OXYGEN AND SULFUR ATOM IS LOCATED IN AN ALIPHATIC CHAIN BETWEEN TWO METHYLENE RADICALS, BOTH ADJACENT TO THE SAID ATOM, WITH APPROXIMATELY ONE MOLECULAR WEIGHT OF FORMALDEHYDE PER MOLE OF DINITRILE IN THE PRESENCE OF AN ACID CATALYST AT LEAST AS STRONG AS PHOSPORIC ACID TO FORM A CONDENSATION POLYMER OF THE DINITRILE AND FORMALDEHYDE AND THEREAFTERSUBJECTING THE RESULTING COMPOUND TO THE ACTION OF WATER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |