Patent US2516404A successfully refreshed from Google Patents.
US2516404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction product of hexachlorocyclopentadiene and chlorsulfonic acid
Assignee: Purdue Research Foundation
•
Filing: 1948-01-09
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Granted: 1950-07-25
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Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
- 👤 Earl T Mcbee
- 👤 Jack S Newcomer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:53
CPC Classifications
C; C07; C07C; C07C309/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
THE PROCESS WHICH INCLUDES: MIXING TOGETHER HEXACHLOROCYCLOPENTADIENE AND CHLOROSULFONIC ACID AT A TEMPERATURE ABOVE ABOUT ROOM TEMPERATURE, TO CAUSE REACTION BETWEEN THE HEXACHLOROCYCLOPENTADIENE AND THE CHLOROSULFONIC ACID.
Claim 2
Dependent Claim
27 words
THE PROCESS WHICH INCLUDES: MIXING TOGETHER HEXACHLOROCYCLOPENTADIENE AND CHLOROSULFONIC ACID AT A TEMPERATURE ABOVE ABOUT ROOM TEMPERATURE, TO CAUSE REACTION BETWEEN THE HEXACHLOROCYCLOPENTADIENE AND THE CHLOROSULFONIC ACID.
References Cited (Backward Citations)
US2240920A
Cited
US2046090A
Cited
US2148928A
Cited
US2337552A
Cited
US2382038A
Cited
GB582205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |