US2497920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticizing agents
Assignee: Victor Chemical Works
•
Filing: 1946-01-26
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Granted: 1950-02-21
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Expires: 1966-01-26
Abstract
No abstract record available.
Inventors
- 👤 Willard H Woodstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PLASTICIZED MATERIAL CONTAINING 80 TO 60% BY WEIGHT OF A MEMBER OF THE CLASS CONSISTING OF A VINYL CHLORIDE POLYMER CONTAINING FROM 80 TO 100% VINYL CHLORIDE AND UP TO 20% VINYL ACETATE, NITROCELLULOSE, AND ETHYL CELLULOSE, AND APPROXIMATELY 20 TO 40% OF A COMPATIBLE PHOSPHONATE ESTER HAVING THE FORMULA:
Claim 2
Dependent Claim
51 words
A PLASTICIZED MATERIAL CONTAINING 80 TO 60% BY WEIGHT OF A MEMBER OF THE CLASS CONSISTING OF A VINYL CHLORIDE POLYMER CONTAINING FROM 80 TO 100% VINYL CHLORIDE AND UP TO 20% VINYL ACETATE, NITROCELLULOSE, AND ETHYL CELLULOSE, AND APPROXIMATELY 20 TO 40% OF A COMPATIBLE PHOSPHONATE ESTER HAVING THE FORMULA:
References Cited (Backward Citations)
US2385879A
Cited
US2365466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |