US3099646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for ethoxylating polyvinyl alcohol
Assignee: Reynolds Metals Co
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Filing: 1961-04-13
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Granted: 1963-07-30
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Expires: 1981-04-13
Abstract
No abstract record available.
Inventors
- 👤 Scardiglia Frank
- 👤 William O Ranky
- 👤 Edward A Knaggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:13
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS OF PRODUCING ETHOXYLATED POLYVINYL CLCOHOL, WHICH CIMPRISES REACTING AT TEMPERATURE WITHIN THE RANGE OF 95* TO 105*C. AND PRESSURES WITHIN THE RANGE OF 45 TO 55 POUNDS PER SQUARE INCH 35 TO 40 PARTS BY WEIGHT OF ETHYLENE OXIDE WITH 100 PARTS BY WEIGHT OF A POLYVINYL ALCOHOL HAVING A MOISTURE CONTENT OF FROM 0.1 TO 5.0 PERCENT BY WEIGHT WHILE DISPERSED IN FROM 125 TO 175 PARTS BY WEIGHT OF SUBSTANTIALLY C7 PARAFFINIC HYDROCARBON.
Claim 2
Dependent Claim
77 words
A PROCESS OF PRODUCING ETHOXYLATED POLYVINYL CLCOHOL, WHICH CIMPRISES REACTING AT TEMPERATURE WITHIN THE RANGE OF 95* TO 105*C. AND PRESSURES WITHIN THE RANGE OF 45 TO 55 POUNDS PER SQUARE INCH 35 TO 40 PARTS BY WEIGHT OF ETHYLENE OXIDE WITH 100 PARTS BY WEIGHT OF A POLYVINYL ALCOHOL HAVING A MOISTURE CONTENT OF FROM 0.1 TO 5.0 PERCENT BY WEIGHT WHILE DISPERSED IN FROM 125 TO 175 PARTS BY WEIGHT OF SUBSTANTIALLY C7 PARAFFINIC HYDROCARBON.
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) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |