US3215649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic latex
Assignee: Shell USA Inc
•
Filing: 1962-12-17
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Granted: 1965-11-02
•
Expires: 1982-12-17
Abstract
No abstract record available.
Inventors
- 👤 Donald M Preiss
- 👤 Warren C Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:55
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; C08J3/00; C08J3/02; C08J3/03; C08J3/07; C08J3/24; C08J3/26; C08J2309/00; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A LATEX OF CIS 1,4-POLYISOPRENE PRODUCED BY SOLUTION POLYMERIZATION, THE POLYISOPRENE HAVING FROM ABOUT 85 TO 97% OF CIS 1,4-ADDITON, HAVING AN I.V. OF 1 TO 10.0 AND BEING ESSENTAILLY STRAIGHT CHAIN POLYMER HAVING A CROSS-LINK DENSITY OF 0 PRIOR TOEMULSIFICATION, THE LATEX HAVING A SOLIDS CONTENT RANGING FROM 60 TO 70% BY WEIGHT AND CONTAINING FROM 0.5 TO 2 PHR. OF AN EMULSIFYING AGENT AND HAVING A CROSSLINK DENSITY RANGING FROM 0.02 TO 0.1X10**4 MOLES PER CUBIC CENTIMETER.
Claim 2
Dependent Claim
79 words
A LATEX OF CIS 1,4-POLYISOPRENE PRODUCED BY SOLUTION POLYMERIZATION, THE POLYISOPRENE HAVING FROM ABOUT 85 TO 97% OF CIS 1,4-ADDITON, HAVING AN I.V. OF 1 TO 10.0 AND BEING ESSENTAILLY STRAIGHT CHAIN POLYMER HAVING A CROSS-LINK DENSITY OF 0 PRIOR TOEMULSIFICATION, THE LATEX HAVING A SOLIDS CONTENT RANGING FROM 60 TO 70% BY WEIGHT AND CONTAINING FROM 0.5 TO 2 PHR. OF AN EMULSIFYING AGENT AND HAVING A CROSSLINK DENSITY RANGING FROM 0.02 TO 0.1X10**4 MOLES PER CUBIC CENTIMETER.
References Cited (Backward Citations)
US2539931A
Cited
US2643233A
Cited
US2640087A
Cited
US2676928A
Cited
US2653918A
Cited
US2801274A
Cited
US2979488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |