Patent EP0917886A1 successfully refreshed from Google Patents.
US2537951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite bodies of insoluble copolymers and method of making same
Assignee: Dow Chemical Co
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Filing: 1946-11-04
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Granted: 1951-01-16
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Expires: 1966-11-04
Abstract
No abstract record available.
Inventors
- 👤 James L Amos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:44
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F210/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
IN A METHOD WHEREIN A POPCORN TYPE OF POLYMER, SUBSTANTIALLY INSOLUBLE IN AND NON-SWELLABLE BY BENZENE, IS FORMED BY POLYMERIZING A MIXTURE COMPRISING A MAJOR PORTION OF A MONOVINYL AROMATIC COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
35 words
IN A METHOD WHEREIN A POPCORN TYPE OF POLYMER, SUBSTANTIALLY INSOLUBLE IN AND NON-SWELLABLE BY BENZENE, IS FORMED BY POLYMERIZING A MIXTURE COMPRISING A MAJOR PORTION OF A MONOVINYL AROMATIC COMPOUND HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
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Cited
US1683402A
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US1673685A
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US2272827A
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US2297724A
Cited
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Cited
US2341175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |