US3256246A
Expired / Lapsed
US
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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 04:39
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
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US2844561A
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US3027352A
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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 |