Patent US2539871A successfully refreshed from Google Patents.
US2539871A
Expired / Lapsed
US
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Method to prepare solutions of gases
Assignee: Centrallaboratorium AB
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Filing: 1945-07-17
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Granted: 1951-01-30
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Expires: 1965-07-17
Abstract
No abstract record available.
Inventors
- 👤 Smedslund Tor Halfdan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:35
CPC Classifications
C; C10; C10L; C10L3/00; C10L3/02; C10L3/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
17 words
AS A COMPOSITION OF MATTER, A HOMOGENEOUS SOLUTION OF DIMETHYL SULFOXIDE AND ACETONE CONTAINING ACETYLENE DISSOLVED THEREIN.
References Cited (Backward Citations)
US2139000A
Cited
US2365898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |