US3454544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the chlorination of polyolefins
Assignee: Dow Chemical Co
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Filing: 1966-11-29
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Granted: 1969-07-08
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Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 Warren L Young
- 👤 Bob Posey Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:35
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN THE PROCESS FOR THE CHLORINATION OF AN ESSENTIALLY LINEAR POLYOLEFIN IN SUSPENSION IN AN INERT LIQUID WHEREIN SAID CHLORINATION TAKES PLACE AT LEAST IN PART AT A TEMPERATURE ABOVE THE AGGLOMERATION TEMPERATURE OF SAID POLYOLEFIN, THE IMPROVEMENT CONSISTING OF: FIRST CHLORINATING SAID POLYOLEFIN AT A TEMPERATURE BELOW ITS AGGLOMERATION TEMPERATURE UP TO A CHLORINE CONTENT OF AT LEAST ABOUT 2 BUT LESS THAN 10 PERCENT BASED ON THE WIEGHT OF SAID POLYOLEFIN, AND THEN CHLORINATING SAID POLYOLEFIN IN A SECOND STAGE AT A TEMPERATURE ABOVE THE AGGLOMERATION TEMPERATURE BUT BELOW THE CRYSTALLINE MELTING POINT OF SAID POLYOLEFIN.
Claim 2
Dependent Claim
98 words
IN THE PROCESS FOR THE CHLORINATION OF AN ESSENTIALLY LINEAR POLYOLEFIN IN SUSPENSION IN AN INERT LIQUID WHEREIN SAID CHLORINATION TAKES PLACE AT LEAST IN PART AT A TEMPERATURE ABOVE THE AGGLOMERATION TEMPERATURE OF SAID POLYOLEFIN, THE IMPROVEMENT CONSISTING OF: FIRST CHLORINATING SAID POLYOLEFIN AT A TEMPERATURE BELOW ITS AGGLOMERATION TEMPERATURE UP TO A CHLORINE CONTENT OF AT LEAST ABOUT 2 BUT LESS THAN 10 PERCENT BASED ON THE WIEGHT OF SAID POLYOLEFIN, AND THEN CHLORINATING SAID POLYOLEFIN IN A SECOND STAGE AT A TEMPERATURE ABOVE THE AGGLOMERATION TEMPERATURE BUT BELOW THE CRYSTALLINE MELTING POINT OF SAID POLYOLEFIN.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |