Patent US3025265A successfully refreshed from Google Patents.
US3025265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New polymerization products and process for their manufacture
Assignee: BASF Schweiz AG
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Filing: 1956-08-06
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Granted: 1962-03-13
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Expires: 1976-08-06
Abstract
No abstract record available.
Inventors
- 👤 Maeder Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:42
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR THE MANUFACTURE OF A POLYMER CONTAINING HYDRAZIDE GROUPS; WHICH COMPRISES HEATING HYDRAZINE WITH A LINEAR ADDITIVE POLYMER WHICH CONTAINS AS SOLE GROUPS CAPABLE OF REACTING WITH HYDRAZINE A SUBSTANTIAL QUANTITY OF CARBOXYLIC ACID ESTER GROUP OF A MONOETHYLENICALLY UNSATURATED ALIPHATIC MONOCARBOXYLIC ACID WITH 3 TO 4 CARBON ATOMS, WHEREBY AT LEAST A PART OF THE ESTER GROUPS ARE REPLACED BY HYDRAZIDE GROUPS AND THE FINAL PRODUCT CONTAINS, IN ADDITION TO STRUCTURAL ELEMENTS CONTAINING HYDRAZIDE GROUPS, STRUCTURAL ELEMENTS OF ANOTHER COPOLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND.
Claim 2
Dependent Claim
86 words
A PROCESS FOR THE MANUFACTURE OF A POLYMER CONTAINING HYDRAZIDE GROUPS; WHICH COMPRISES HEATING HYDRAZINE WITH A LINEAR ADDITIVE POLYMER WHICH CONTAINS AS SOLE GROUPS CAPABLE OF REACTING WITH HYDRAZINE A SUBSTANTIAL QUANTITY OF CARBOXYLIC ACID ESTER GROUP OF A MONOETHYLENICALLY UNSATURATED ALIPHATIC MONOCARBOXYLIC ACID WITH 3 TO 4 CARBON ATOMS, WHEREBY AT LEAST A PART OF THE ESTER GROUPS ARE REPLACED BY HYDRAZIDE GROUPS AND THE FINAL PRODUCT CONTAINS, IN ADDITION TO STRUCTURAL ELEMENTS CONTAINING HYDRAZIDE GROUPS, STRUCTURAL ELEMENTS OF ANOTHER COPOLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND.
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) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |