Patent US2953547A successfully refreshed from Google Patents.
US2953547A
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US
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Method of preparing cross-linked vinyl aromatic resinous polymers
Assignee: Chemical Process Co
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Filing: 1955-12-28
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Granted: 1960-09-20
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Expires: 1975-12-28
Abstract
No abstract record available.
Inventors
- 👤 James A Patterson
- 👤 Irving M Abrams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:34
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; B01J41/00; B01J41/08; B01J41/12; B01J41/14; B01J47/00; B01J47/12; C; C08; C08F; C08F8/00; C08F8/34; C08F8/44; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF CROSS-LINKING A SOLID LINEAR MONO VINYL ARYL POLYMER SELECTED FROM THE GROUP CONSISTING OF A LINEAR POLYMER OF A MONO VINYL ARYL HYDROCARBON AND A LINER POLYMER OF A MONO VINYL ARYL NUCLEAR CHLORINATED HYDROCARBON, WHICH COMPRISES REACTING SAID POLYMER WITH A MIXTURE OF AN ACID FROM THE GROUP CONSISTING OF SULFURIC ACID AND CHLOROSULFONIC ACID AND FORMALDEHYDE AT A TEMPERATURE BELOW ABOUT 50*C. TO CROSS-LINK SAID POLYMER, THERE BEING AT LEAST ONE MOLE OF ACID AND ONE MOLE OF FORMALDEHYDE FOR EACH ARYL GROUP IN SAID POLYMER, THE CONCENTRATION OF ACID BEING AT LEAST 70% OF THE WEIGHT OF ACID AND WATER PRESENT.
Claim 2
Independent Claim
107 words
THE METHOD OF CROSS-LINKING A SOLID LINEAR MONO VINYL ARYL POLYMER SELECTED FROM THE GROUP CONSISTING OF A LINEAR POLYMER OF A MONO VINYL ARYL HYDROCARBON AND A LINER POLYMER OF A MONO VINYL ARYL NUCLEAR CHLORINATED HYDROCARBON, WHICH COMPRISES REACTING SAID POLYMER WITH A MIXTURE OF AN ACID FROM THE GROUP CONSISTING OF SULFURIC ACID AND CHLOROSULFONIC ACID AND FORMALDEHYDE AT A TEMPERATURE BELOW ABOUT 50*C. TO CROSS-LINK SAID POLYMER, THERE BEING AT LEAST ONE MOLE OF ACID AND ONE MOLE OF FORMALDEHYDE FOR EACH ARYL GROUP IN SAID POLYMER, THE CONCENTRATION OF ACID BEING AT LEAST 70% OF THE WEIGHT OF ACID AND WATER PRESENT.
References Cited (Backward Citations)
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US2366008A
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US2591573A
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US2629710A
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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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |