Patent US2597494A successfully refreshed from Google Patents.
US2597494A
Expired / Lapsed
US
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Strongly basic anion-exchange polymers of vinylanisole
Assignee: Rohm and Haas Co
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Filing: 1951-05-12
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Granted: 1952-05-20
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Expires: 1971-05-12
Abstract
No abstract record available.
Inventors
- 👤 Jesse C H Hwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:06
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
AS A NEW COMPOSITION OF MATTER, AN OPAQUE, INFUSIBLE, PROLIFEROUS POLYMER CONTAINING AT LEAST 70% PROLIFEROUS POLYMER VINYLANISOLE TO THE AROMATIC NUCLEI OF WHICH ARE ATTACHED SUBSTITUENT GROUPS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
32 words
AS A NEW COMPOSITION OF MATTER, AN OPAQUE, INFUSIBLE, PROLIFEROUS POLYMER CONTAINING AT LEAST 70% PROLIFEROUS POLYMER VINYLANISOLE TO THE AROMATIC NUCLEI OF WHICH ARE ATTACHED SUBSTITUENT GROUPS HAVING THE GENERAL 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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |