US3491071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of acrylonitrile styrene and alphamethylstyrene
Assignee: Montedison SpA
•
Filing: 1968-07-01
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Granted: 1970-01-20
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Expires: 1988-07-01
Abstract
No abstract record available.
Inventors
- 👤 Rosario Lanzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:32
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3201375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |