Patent US2817648A successfully refreshed from Google Patents.
US2817648A
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Process for inhibiting polymerization in free-radical reactions
Assignee: Hercules Powder Co
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Filing: 1954-12-24
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Granted: 1957-12-24
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Expires: 1974-12-24
Abstract
No abstract record available.
Inventors
- 👤 Charles W Gould
- 👤 Stearns T Putnam
- 👤 John C Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:38
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/20; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN THE PREPARATION OF A SYNTHETIC RUBBER LATEX BY THE AQUEOUS EMULSION POLYMERIZATION OF A MIXTURE OF BUTADIENE-1,3 AND STYRENE, THE STEP OF INHIBITING FURTHER POLYMERIZATION WHICH COMPRISES ADDING TO THE EMULSION FROM ABOUT 0.01 TO ABOUT 1 PART, PER 100 PARTS OF POLYMERIZABLE MATERIAL INITIALLY PRESENT, OF THE REACTION PRODUCT OF SULFUR WITH AN ORGANIC MATERIAL CONTAINING THE
Claim 2
Dependent Claim
59 words
IN THE PREPARATION OF A SYNTHETIC RUBBER LATEX BY THE AQUEOUS EMULSION POLYMERIZATION OF A MIXTURE OF BUTADIENE-1,3 AND STYRENE, THE STEP OF INHIBITING FURTHER POLYMERIZATION WHICH COMPRISES ADDING TO THE EMULSION FROM ABOUT 0.01 TO ABOUT 1 PART, PER 100 PARTS OF POLYMERIZABLE MATERIAL INITIALLY PRESENT, OF THE REACTION PRODUCT OF SULFUR WITH AN ORGANIC MATERIAL CONTAINING THE
References Cited (Backward Citations)
US2616875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |