US2980658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer of an alkyl methacrylate and an alpha-acyloxystyrene, and method for preparing same
Assignee: Avantor Performance Materials LLC
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Filing: 1956-05-14
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Granted: 1961-04-18
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Expires: 1976-05-14
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:26
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F18/00; C08F18/02; C08F18/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
POLYMERIZATION PRODUCTS CONSISTING OF 55-90 PARTS BY WEIGHT OF AN ALKYL METHACRYLATE IN WHICH THE ALKYL GROUPS IS FROM ONE TO FOUR CARBON ATOMS AND 10-45 PARTS BY WEIGHT OF AN ALPHA-ACRYLOXYSTYRENE HAVING THE FORMULA
Claim 2
Dependent Claim
35 words
POLYMERIZATION PRODUCTS CONSISTING OF 55-90 PARTS BY WEIGHT OF AN ALKYL METHACRYLATE IN WHICH THE ALKYL GROUPS IS FROM ONE TO FOUR CARBON ATOMS AND 10-45 PARTS BY WEIGHT OF AN ALPHA-ACRYLOXYSTYRENE HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |