US2979478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition containing polyvinyl alcohol and a neutral ester of phosphoric acid
Assignee: Virginia Carolina Chemical Corp
•
Filing: 1959-06-19
•
Granted: 1961-04-11
•
Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
- 👤 Melton Thomas Mason
- 👤 Richard A Matthews
- 👤 Harry F O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A COMPOSITION OF MATTER COMPRISING A POLYVINYL ALCOHOL AND FROM 5% TO 75% BY WEIGHT, BASED UPON THE WEIGHT OF THE POLYVINYL ALCOHOL, OF A NEUTRAL ESTER OF THE FORMULA
Claim 2
Dependent Claim
30 words
A COMPOSITION OF MATTER COMPRISING A POLYVINYL ALCOHOL AND FROM 5% TO 75% BY WEIGHT, BASED UPON THE WEIGHT OF THE POLYVINYL ALCOHOL, OF A NEUTRAL ESTER OF THE FORMULA
References Cited (Backward Citations)
US2830069A
Cited
US2842462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |