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Patent US2895844A successfully refreshed from Google Patents.
US2895844A
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Acetoacetic acid esters of castor oil and the use thereof in plasticization
Assignee: PPG Industries Inc
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Filing: 1954-11-12
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Granted: 1959-07-21
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Expires: 1974-11-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Bader
- 👤 Henry A Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:58
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/16; C08L1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
NITROCELLULOSE PLASTICIZED WITH THE ACETOACTIC ACID ESTER OF CASTOR OIL.
Claim 2
Dependent Claim
10 words
NITROCELLULOSE PLASTICIZED WITH THE ACETOACTIC ACID ESTER OF CASTOR OIL.
References Cited (Backward Citations)
US2500918A
Cited
US2693484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |