US2590651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
After-chlorination of polyvinyl chloride
Assignee: Occidental Chemical Corp
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Filing: 1949-06-06
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Granted: 1952-03-25
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Expires: 1969-06-06
Abstract
No abstract record available.
Inventors
- 👤 David S Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:01
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
A PROCESS FOR THE AFTER-CHLORINATION OF POLYVINYL CHLORIDE, WHICH INCLUDES: CONTACTING CHLORINE GAS AND WATER-VAPOR SO AS TO INTRODUCE BETWEEN 0.1 PERCENT AND THAT AMOUNT OF WATERVAPOR WHICH THE CHLORINE GAS WILL CARRY AT A TEMPERATURE 20 CENTRIGRADE DEGRESS BELOW THE TEMPERATURE EMPLOYED IN THE REACTION ZONE; CONTACTING SUCH WATER-VAPOR-CARRYING CHLORINE GAS, IN THE PRESENCE OF ACTINIC RADIATION AND AT A REACTION ZONE TEMPERATURE BETWEEN 50 AND 150 DEGREES
References Cited (Backward Citations)
CH215151A
Cited
US2426080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |