US2597016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of trichlorovinylpentachlorocyclopentadiene
Assignee: Purdue Research Foundation
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Filing: 1947-06-28
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Granted: 1952-05-20
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Expires: 1967-06-28
Abstract
No abstract record available.
Inventors
- 👤 Earl T Mcbee
- 👤 Jack S Newcomer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:31
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/02; C07C23/08; C07C17/00; C07C17/26; C07C17/32; C07C2601/00; C07C2601/06; C07C2601/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
A PROCES FOR THE PRODUCTION OF TRICHLOROVINYLPENTACHLOROCYCLOPENTADIENE WHICH COMPRISES HEATING 5-(1,2,2,2-TETRACHLOROETHYL) PENTACHLOROCYCLOPENTADIENE AT A TEMPERATURE BETWEEN APPROXIMATELY 90 AND APPROXIMATELY 180 DEGREES CENTIGRADE IN THE PRESENCE OF ALUMINUM CHLORIDE AND SUBSEQUENTLY RECOVERING TRICHLOROVINYLPENTACHLOROCYCLOPENTADIENE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
37 words
A PROCES FOR THE PRODUCTION OF TRICHLOROVINYLPENTACHLOROCYCLOPENTADIENE WHICH COMPRISES HEATING 5-(1,2,2,2-TETRACHLOROETHYL) PENTACHLOROCYCLOPENTADIENE AT A TEMPERATURE BETWEEN APPROXIMATELY 90 AND APPROXIMATELY 180 DEGREES CENTIGRADE IN THE PRESENCE OF ALUMINUM CHLORIDE AND SUBSEQUENTLY RECOVERING TRICHLOROVINYLPENTACHLOROCYCLOPENTADIENE FROM THE REACTION MIXTURE.
Claim 3
Dependent Claim
42 words
TRICHLOROVINYLPENTACHLOROCYCLOPENTADIENE, WHICH IS A NORMALLY LIQUID SUBSTANCE HAVING THE EMPIRICAL FORMULA C7CL8, A BOILING POINT OF APPROXIMATELY 138 DEGREES CENTIGRADE AT A PRESSURE OF 5 MILLIMETERS OF MERCURY, A DENSITY (D420) OF APPROXIMATELY 1.736 AND A REFRACTIVE INDEX (ND20) OF APPROXIMATELY 1.585.
Claim 4
Dependent Claim
42 words
TRICHLOROVINYLPENTACHLOROCYCLOPENTADIENE, WHICH IS A NORMALLY LIQUID SUBSTANCE HAVING THE EMPIRICAL FORMULA C7CL8, A BOILING POINT OF APPROXIMATELY 138 DEGREES CENTIGRADE AT A PRESSURE OF 5 MILLIMETERS OF MERCURY, A DENSITY (D420) OF APPROXIMATELY 1.736 AND A REFRACTIVE INDEX (ND20) OF APPROXIMATELY 1.585.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |