US2642398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acylated polystyrene
Assignee: Monsanto Chemicals Ltd
•
Filing: 1947-02-26
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Granted: 1953-06-16
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Expires: 1967-02-26
Abstract
No abstract record available.
Inventors
- 👤 Butler John Mann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F8/00; C08F8/10; C10M2209/00; C10M2209/02; C10M2209/10; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
A MINERAL OIL CONTAINING DISSOLVED THEREIN 0.1% TO 10% BY WEIGHT OF POLYSTYRENE OF AVERAGE MOLECULAR WEIGHT BETWEEN 3,000 AND 1,000,000 AND WHICH HAS BEEN ACYLATED WITH A MONOCARBOXYLIC FATTY ACID CHLORIDE CONTAINING FROM 8
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |