Patent US2637753A successfully refreshed from Google Patents.
US2637753A
Expired / Lapsed
US
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Process for chlorinating natural rubber
Assignee: Rubber and Asbestos Corp
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Filing: 1951-06-16
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Granted: 1953-05-05
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Expires: 1971-06-16
Abstract
No abstract record available.
Inventors
- 👤 Becn Jerome
- 👤 Martin M Grover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:38
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/12; C08C19/14; C08C19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR PREPARING CHLORINATED DERIVATIVES OF NATURAL RUBBER, IN WHICH A MASS CONSISTING OF SOLID NATURAL RUBBER IS HEATED AT A TEMPERATURE OF AT LEAST 400* F. UNTIL IN A PERMANENT LIQUID STATE AND THEN REACTED WITH A CHLORINATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLORINE, SULFURYL CHLORIDE, AND THIONYL CHLORIDE.
Claim 2
Dependent Claim
53 words
A PROCESS FOR PREPARING CHLORINATED DERIVATIVES OF NATURAL RUBBER, IN WHICH A MASS CONSISTING OF SOLID NATURAL RUBBER IS HEATED AT A TEMPERATURE OF AT LEAST 400* F. UNTIL IN A PERMANENT LIQUID STATE AND THEN REACTED WITH A CHLORINATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLORINE, SULFURYL CHLORIDE, AND THIONYL CHLORIDE.
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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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |