Patent US3316206A successfully refreshed from Google Patents.
US3316206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermo-stabilized copolymers of trioxane with urea compounds
Assignee: Hoechst AG
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Filing: 1963-04-22
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Granted: 1967-04-25
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Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Hermann Hans Dieter
- 👤 Roos Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A COPOLYMER WHOSE REPEATING UNITS CONSIST ESSENTIALLY OF -OCH2- GROUPS INTERSPERSED WITH 0.1 TO 50% BY WEIGHT OF -OCH2CH2-(R3)N- GROUPS IN WHICH R3 IS SELECTED FROM THE GROUP CONSISTING OF METHYLENE, LOWER ALKYL-SUBSTITUTED METHYLENE AND LOWER ALKYL-SUBSTITUTED OXYMETHYLENE RADICALS AND N IS 0 TO 2, SAID COPOLYMER BEING IN INTIMATE ADMIXTURE WITH FROM 0.01 TO 10% BY WEIGHT OF N,N''-BIS-(1--AMINOETHYL) - UREA, 2-AMINO-2UREIDOBUTYRIC ACID ESTER, BIS-(UREIDOMETHYL)-AMINE, TRIS(UREIDOMETHYL) - AMINE, DIPROPYLENE-TRIAMINE-DIUREA, NBIS-(UREIDOETHYL)-2 - NITRILOETHYLAMINE, 2,4-BIS-UREIDODIPHENYLAMINE, N-BIS-(UREIDOETHYL) - 2 - NITRILO-OCTADECYLAMINE OR 1,6-BIS-(2-PYRIDYLCARBONYLUREIDO)-HEXAMETHYLENE.
Claim 2
Dependent Claim
81 words
A COPOLYMER WHOSE REPEATING UNITS CONSIST ESSENTIALLY OF -OCH2- GROUPS INTERSPERSED WITH 0.1 TO 50% BY WEIGHT OF -OCH2CH2-(R3)N- GROUPS IN WHICH R3 IS SELECTED FROM THE GROUP CONSISTING OF METHYLENE, LOWER ALKYL-SUBSTITUTED METHYLENE AND LOWER ALKYL-SUBSTITUTED OXYMETHYLENE RADICALS AND N IS 0 TO 2, SAID COPOLYMER BEING IN INTIMATE ADMIXTURE WITH FROM 0.01 TO 10% BY WEIGHT OF N,N''-BIS-(1--AMINOETHYL) - UREA, 2-AMINO-2UREIDOBUTYRIC ACID ESTER, BIS-(UREIDOMETHYL)-AMINE, TRIS(UREIDOMETHYL) - AMINE, DIPROPYLENE-TRIAMINE-DIUREA, NBIS-(UREIDOETHYL)-2 - NITRILOETHYLAMINE, 2,4-BIS-UREIDODIPHENYLAMINE, N-BIS-(UREIDOETHYL) - 2 - NITRILO-OCTADECYLAMINE OR 1,6-BIS-(2-PYRIDYLCARBONYLUREIDO)-HEXAMETHYLENE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |