Patent US3023199A successfully refreshed from Google Patents.
US3023199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl-alcohol resin resistant to water and method of making it
Assignee: United States Steel Corp
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Filing: 1959-06-08
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Granted: 1962-02-27
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Expires: 1979-06-08
Abstract
No abstract record available.
Inventors
- 👤 John O Hawthorne
- 👤 Myron H Wilt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:04
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/14; C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF MAKING POLYVINYL-ALCOHOL RESIN WHICH CONSISTS IN MIXING WITH N AQUEOUS POLYVINYL-ALCOHOL SOLUTION FROM .1 TO 1% BY WEIGHT OF THE DISSOLVED POLYVINYL-ALCOHOL RESIN, OF AN ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC, SULPHURIC AND PHOSPHORIC AND FROM 0.5 TO 15% BY WEIGHT OF POLYVINYL-ALCOHOL RESIN, OF 5-HYDROXY-5H-DIBENZ(C, E)AZEPINE, AND PERMITTING REACTION OF THE MIXTURE TO CURE IT.
Claim 2
Independent Claim
61 words
A METHOD OF MAKING POLYVINYL-ALCOHOL RESIN WHICH CONSISTS IN MIXING WITH N AQUEOUS POLYVINYL-ALCOHOL SOLUTION FROM .1 TO 1% BY WEIGHT OF THE DISSOLVED POLYVINYL-ALCOHOL RESIN, OF AN ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC, SULPHURIC AND PHOSPHORIC AND FROM 0.5 TO 15% BY WEIGHT OF POLYVINYL-ALCOHOL RESIN, OF 5-HYDROXY-5H-DIBENZ(C, E)AZEPINE, AND PERMITTING REACTION OF THE MIXTURE TO CURE IT.
References Cited (Backward Citations)
US2169250A
Cited
US2749208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |