Patent US3256246A successfully refreshed from Google Patents.
US3256246A
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Copolymerization of trioxane with preformed linear polymers
Assignee: Hoechst AG
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Filing: 1962-10-23
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Granted: 1966-06-14
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Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Gutweiler Klemens
- 👤 Fischer Edgar
- 👤 Bier Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:34
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/10; C08G2/18; C08G2/28; C08G2/38; C08G4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A PROCESS FOR THE COPOLYMERIZATION OF TRIOXANE WITH A CO-REACTANT IN THE PRESENCE OF A POLYMERIZATION CATALYST, THE IMPROVEMENT WHEREIN FROM ONE-THIRD TO 2000 MOLAR PARTS OF TRIOXANE ARE COPOLYMERIZED AT A TEMPERATURE OF FROM ABOUT -100*C. TO ABOUT 150*C. WITH ONE MOLAR PART OF A PRE-FORMED LINEAR POLYMER SOLUBLE IN TRIOXANE AND CONSISTING ESSENTIALLY OF THE RECURRENT UNIT
Claim 2
Dependent Claim
60 words
IN A PROCESS FOR THE COPOLYMERIZATION OF TRIOXANE WITH A CO-REACTANT IN THE PRESENCE OF A POLYMERIZATION CATALYST, THE IMPROVEMENT WHEREIN FROM ONE-THIRD TO 2000 MOLAR PARTS OF TRIOXANE ARE COPOLYMERIZED AT A TEMPERATURE OF FROM ABOUT -100*C. TO ABOUT 150*C. WITH ONE MOLAR PART OF A PRE-FORMED LINEAR POLYMER SOLUBLE IN TRIOXANE AND CONSISTING ESSENTIALLY OF THE RECURRENT UNIT
References Cited (Backward Citations)
CA582945A
Cited
US2394910A
Cited
US2844561A
Cited
US3027352A
Cited
AT218743B
Cited
GB878163A
Cited
FR1263162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |