Patent US2598407A successfully refreshed from Google Patents.
US2598407A
Expired / Lapsed
US
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Cross-linked polymeric materials and method of making same
Assignee: EIDP Inc
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Filing: 1947-09-25
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Granted: 1952-05-27
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Expires: 1967-09-25
Abstract
No abstract record available.
Inventors
- 👤 Carl S Marvel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:53
CPC Classifications
C; C08; C08B; C08B15/00; C08B15/005; D; D06; D06M; D06M13/00; D06M13/244; D06M13/248; D06M13/252
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
CELLULOSE ACETATE CHLOROACETATE INSOLUBILIZED BY CROSS-LINKING THE CHLOROACETATE GROUPS THEREIN WITH A CROSS-LINKING AGENT SELECTED FROM THE CLASS CONSISTING OF POLYTHIOLS AND MERCAPTIDES, THE SAID INSOLUBILIZED CHLOROACETATE BEING INSOLUBLE IN SOLVENTS FOR THE UNMODIFIED CHLOROACETATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |