Patent US2298163A successfully refreshed from Google Patents.
US2594579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polystyrene interpolymers convertible to the infusible and insoluble state
Assignee: Hexion Inc
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Filing: 1948-08-14
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Granted: 1952-04-29
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Expires: 1968-08-14
Abstract
No abstract record available.
Inventors
- 👤 Emil E Novotny
- 👤 Vogelsang George Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:14
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F8/30; C08F8/34; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
AN INTERPOLYMER CONSISTING ESSENTIALLY OF STYRENE AND ANOTHER SUBSTANCE FROM THE GROUP CONSISTING OF MONO-VINYL PHENOLS, MONO-VINYL THIOPHENOLS, AMINO STYRENES, MONO-VINYL ACETATES HYDROLIZED AFTER INTERPOLYMERIZATION TO REPLACE ESTER GROUPS WITH HYDROXYL GROUPS, NITRO-STYRENES REDUCED AFTER INTERPOLYMERIZATION TO REPLACE NITRO GROUPS WITH AMINO GROUPS, AND MONO-VINYL HALIDES HYDROLIZED AFTER INTERPOLYMERIZATION TO REPLACE HALOGEN ATOMS WITH HYDROXYL OR AMINO GROUPS, SAID HYDROXYL, AMINO, OR SULFHYDRYL GROUPS, AS THE CASE MAY BE, BEING PRESENT IN SAID INTERPOLYMER TO THE EXTENT OF NOT LESS THAN ONE SUCH GROUP PER 100 ORIGINAL STYRENE MOLECULES, SAID INTERPOLYMER BEING SOLUBLE AND FUSIBLE AND BEING CONVERTIBLE TO THE INSOLUBLE AND INFUSIBLE STATE VIA THE AGENCY OF CROSS-LINKING OR CURING AGENTS.
Claim 2
Dependent Claim
112 words
AN INTERPOLYMER CONSISTING ESSENTIALLY OF STYRENE AND ANOTHER SUBSTANCE FROM THE GROUP CONSISTING OF MONO-VINYL PHENOLS, MONO-VINYL THIOPHENOLS, AMINO STYRENES, MONO-VINYL ACETATES HYDROLIZED AFTER INTERPOLYMERIZATION TO REPLACE ESTER GROUPS WITH HYDROXYL GROUPS, NITRO-STYRENES REDUCED AFTER INTERPOLYMERIZATION TO REPLACE NITRO GROUPS WITH AMINO GROUPS, AND MONO-VINYL HALIDES HYDROLIZED AFTER INTERPOLYMERIZATION TO REPLACE HALOGEN ATOMS WITH HYDROXYL OR AMINO GROUPS, SAID HYDROXYL, AMINO, OR SULFHYDRYL GROUPS, AS THE CASE MAY BE, BEING PRESENT IN SAID INTERPOLYMER TO THE EXTENT OF NOT LESS THAN ONE SUCH GROUP PER 100 ORIGINAL STYRENE MOLECULES, SAID INTERPOLYMER BEING SOLUBLE AND FUSIBLE AND BEING CONVERTIBLE TO THE INSOLUBLE AND INFUSIBLE STATE VIA THE AGENCY OF CROSS-LINKING OR CURING AGENTS.
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) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |