US3355438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ethylene and itaconic anhydride copolymers
Assignee: Gulf Oil Corp
•
Filing: 1964-10-29
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Granted: 1967-11-28
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Expires: 1984-10-29
Abstract
No abstract record available.
Inventors
- 👤 Harold D Lyons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
C; C08; C08F; C08F222/00; C08F222/10; C08F222/12; C08F222/16; C08F10/00; C08F8/00; C08F8/12; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A PROCES FOR PREPARING A COPOLYMER OF ETHYLENE AND ITACONIC ANHYDRIDE COMPRISING, FORMING A SOLUTION OF A MONOALKYL ITSCONATE OF THE FORMULA
Claim 2
Dependent Claim
22 words
A PROCES FOR PREPARING A COPOLYMER OF ETHYLENE AND ITACONIC ANHYDRIDE COMPRISING, FORMING A SOLUTION OF A MONOALKYL ITSCONATE OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |