US2810716A
Expired / Lapsed
US
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Batchwise copolymerization technique
Assignee: White Laboratories Inc
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Filing: 1954-06-28
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Granted: 1957-10-22
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Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Richard L Markus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:46
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F36/00; C08F36/02; C08F36/20; Y; Y10; Y10S; Y10S526/00; Y10S526/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR PRODUCNG SWELLABLE RESINS WHICH COMPRISES: CONTACTING, IN THE PRESENCE OF A POLYMERIZATION AND COPOLYMERIZATION INITIATOR, AND MONOMERIC MATERIAL SUBJECT TO BOTH HOMO-AND CO-POLYMERIZATION WITH BETWEEN ABOUT 0.01 AND 0.2 PERCENT OF A POLYUNSATURATED COPOLYMERIZABLE CROSS-LINKING AGENT, SAID CONTACTING BEING CARRIED OUT IN THE PRESENCE OF A REACTION MEDIUM COMPRISING AN AQUEOUS SOLUTION AT LEAST ONE HALF MOLAR IN SOLUBLE NON-REDOX DIVALENT-ION CONTAINING SALT.
Claim 2
Dependent Claim
66 words
A PROCESS FOR PRODUCNG SWELLABLE RESINS WHICH COMPRISES: CONTACTING, IN THE PRESENCE OF A POLYMERIZATION AND COPOLYMERIZATION INITIATOR, AND MONOMERIC MATERIAL SUBJECT TO BOTH HOMO-AND CO-POLYMERIZATION WITH BETWEEN ABOUT 0.01 AND 0.2 PERCENT OF A POLYUNSATURATED COPOLYMERIZABLE CROSS-LINKING AGENT, SAID CONTACTING BEING CARRIED OUT IN THE PRESENCE OF A REACTION MEDIUM COMPRISING AN AQUEOUS SOLUTION AT LEAST ONE HALF MOLAR IN SOLUBLE NON-REDOX DIVALENT-ION CONTAINING SALT.
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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |