US2849431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorination of polypropylene
Assignee: EIDP Inc
•
Filing: 1955-07-05
•
Granted: 1958-08-26
•
Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Baxter Warren Nesmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:34
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; Y; Y10; Y10S; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
PROCESS FOR CHLORINATING NORMALLY PARTIALLY CRYSTALLINE SOLID POLYPROPYLENE IN CC14 SOLUTION BY REACTION WITH CHLORINE IN THE PRESENCE OF 0.005 TO 2.0% TITANIUM TETRACHLORIDE, BASED ON THE WEIGHT OF CC14, SAID POLYPROPYLENE BEING FURTHER CHARACTERIZED IN THAT IT IS OBTAINED BY HOMOPOLYMERIZATION OF PROPYLENE IN THE PRESENCE OF A TICI4-ALUMINUM ALKYL CATALYST.
Claim 2
Dependent Claim
52 words
PROCESS FOR CHLORINATING NORMALLY PARTIALLY CRYSTALLINE SOLID POLYPROPYLENE IN CC14 SOLUTION BY REACTION WITH CHLORINE IN THE PRESENCE OF 0.005 TO 2.0% TITANIUM TETRACHLORIDE, BASED ON THE WEIGHT OF CC14, SAID POLYPROPYLENE BEING FURTHER CHARACTERIZED IN THAT IT IS OBTAINED BY HOMOPOLYMERIZATION OF PROPYLENE IN THE PRESENCE OF A TICI4-ALUMINUM ALKYL CATALYST.
References Cited (Backward Citations)
US2183556A
Cited
US2692257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |