US2956939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing stable polymers and the resultant product
Assignee: GAF Chemicals Corp
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Filing: 1958-04-18
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Granted: 1960-10-18
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Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Harry D Anspon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:12
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/22; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METHOD FOR THE MASS POLYMERIZATION OF METHYL A-FLUOROACRYLATE WHICH COMPRISES PARTIALLY POLYMERIZING SAID MONOMER AT ABOUT ROOM TEMPERATURE IN THE PRESENCE OF ACTINIC RADIATION FOR ABOUT 8 HRS., CONTINUING THE POLYMERIZATION PROCESS AT A TEMPERATURE OF ABOUT 100* C. FOR 12 HOURS, AND COMPLETING POLYMERIZATION AT A TEMPERATURE OF ABOUT 190* C. FOR ABOUT 3 HRS.
Claim 2
Independent Claim
57 words
A METHOD FOR THE MASS POLYMERIZATION OF METHYL A-FLUOROACRYLATE WHICH COMPRISES PARTIALLY POLYMERIZING SAID MONOMER AT ABOUT ROOM TEMPERATURE IN THE PRESENCE OF ACTINIC RADIATION FOR ABOUT 8 HRS., CONTINUING THE POLYMERIZATION PROCESS AT A TEMPERATURE OF ABOUT 100* C. FOR 12 HOURS, AND COMPLETING POLYMERIZATION AT A TEMPERATURE OF ABOUT 190* C. FOR ABOUT 3 HRS.
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) | 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 |