US2579008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpolymers of unsaturated nitriles
Assignee: Shell Development Co
•
Filing: 1948-05-24
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Granted: 1951-12-18
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Expires: 1968-05-24
Abstract
No abstract record available.
Inventors
- 👤 Naps Marguerite
- 👤 Fred E Condo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:56
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A RESIN COMPRISING AN INTERPOLYMER OF 65% METHACRYLONITRILE, 25% ACRYLONITRILE, AND 10% VINYL ACETATE.
Claim 2
Dependent Claim
14 words
A RESIN COMPRISING AN INTERPOLYMER OF 65% METHACRYLONITRILE, 25% ACRYLONITRILE, AND 10% VINYL ACETATE.
References Cited (Backward Citations)
US2232899A
Cited
US2486241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |