Patent US2711430A successfully refreshed from Google Patents.
US2711430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the yield of methyl sulfide obtained by heating waste liquors fro cellulose manufacture by adding inorganic sulfides
Assignee: SVENSKA CELLULOSAFORENINGENS C
•
Filing: 1951-04-27
•
Granted: 1955-06-21
•
Expires: 1971-04-27
Abstract
No abstract record available.
Inventors
- 👤 Hagglund Erik Karl Manritz
- 👤 Enkvist Terje Ulf Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:12
CPC Classifications
C; C07; C07C; C07C321/00; D; D21; D21C; D21C11/00; D21C11/0007; Y; Y10; Y10S; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
THE METHOD OF PRODUCING METHYL SULFIDE WHICH COMPRISES ADDING AN INORGANIC SULFIDE TO WASTE LIQUOR FROM ALKALINE CELLULOSE DIGESTION, HEATING THE MIXTURE AT A TEMPERATURE BETWEEN 150* C. AND 500* C., AND RECOVERING THE METHYL SULFIDE FORMED THEREBY.
Claim 2
Independent Claim
38 words
THE METHOD OF PRODUCING METHYL SULFIDE WHICH COMPRISES ADDING AN INORGANIC SULFIDE TO WASTE LIQUOR FROM ALKALINE CELLULOSE DIGESTION, HEATING THE MIXTURE AT A TEMPERATURE BETWEEN 150* C. AND 500* C., AND RECOVERING THE METHYL SULFIDE FORMED THEREBY.
References Cited (Backward Citations)
US1910441A
Cited
US1834676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |