Patent US3267644A successfully refreshed from Google Patents.
US3267644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for drying vinyl chloride
Assignee: Knapsack AG
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Filing: 1965-05-18
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Granted: 1966-08-23
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Expires: 1985-05-18
Abstract
No abstract record available.
Inventors
- 👤 Jacobowsky Armin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:49
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS OF DRYING HYDROUS VINYL CHLORIDE IN A CONTINUOUS DRYING CYCLE COMPRISING (1) CONTACTING GAS EOUS VINYL CHLORIDE CONTAINING WATER VAPOR WITH A DRYING AGENT SELECTED FROM THE GROUP CONSISTING OF SILICA GEL AND ALUMINUM GEL AND ADSORBING THE WATER VAPOR FROM THE GASEOUS VINYL CHLORIDE TO THE DRYING AGENT, (II) REGENERATING THE DRYING AGENT NOW CHARGED WITH WATER BY CONTACTING THE DRYING AGENT WITH DRY VINYL CHLORIDE AT A TEMPERATURE BETWEEN ABOUT 130* C.-ABOUT 200* C., (III) COOLING THE DRYING AGENT AND (IV) USING THE COOLED DRYING AGENT FOR DRYING GASEOUS VINYL CHLORIDE CONTAINING WATER VAPOR.
Claim 2
Dependent Claim
98 words
A PROCESS OF DRYING HYDROUS VINYL CHLORIDE IN A CONTINUOUS DRYING CYCLE COMPRISING (1) CONTACTING GAS EOUS VINYL CHLORIDE CONTAINING WATER VAPOR WITH A DRYING AGENT SELECTED FROM THE GROUP CONSISTING OF SILICA GEL AND ALUMINUM GEL AND ADSORBING THE WATER VAPOR FROM THE GASEOUS VINYL CHLORIDE TO THE DRYING AGENT, (II) REGENERATING THE DRYING AGENT NOW CHARGED WITH WATER BY CONTACTING THE DRYING AGENT WITH DRY VINYL CHLORIDE AT A TEMPERATURE BETWEEN ABOUT 130* C.-ABOUT 200* C., (III) COOLING THE DRYING AGENT AND (IV) USING THE COOLED DRYING AGENT FOR DRYING GASEOUS VINYL CHLORIDE CONTAINING WATER VAPOR.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |