US3020264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proces for the production of eupolyoxymethylenes with sulfur catalyst
Assignee: Evonik Operations GmbH
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Filing: 1960-01-06
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Granted: 1962-02-06
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Expires: 1980-01-06
Abstract
No abstract record available.
Inventors
- 👤 Behrends Jurgen
- 👤 Schweitzer Otto
- 👤 Kern Werner
- 👤 Hopff Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:52
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS FOR THE PRODUCTION OF EUPOLYOXYMETHYLENES COMPRISING POLYMERIZING MONOMERIC FORMALDEHYDE IN CONTACT WITH ELEMENTAL SULFUR IN A LIQUID MEDIUM SELECTED FROM THE GROUP CONSISTING OF BENZINE AND DECALIN UNDER ESSENTIALLY WATER-FREE CONDITIONS.
Claim 2
Dependent Claim
33 words
A PROCESS FOR THE PRODUCTION OF EUPOLYOXYMETHYLENES COMPRISING POLYMERIZING MONOMERIC FORMALDEHYDE IN CONTACT WITH ELEMENTAL SULFUR IN A LIQUID MEDIUM SELECTED FROM THE GROUP CONSISTING OF BENZINE AND DECALIN UNDER ESSENTIALLY WATER-FREE CONDITIONS.
References Cited (Backward Citations)
US2848437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |