Patent US3566923A successfully refreshed from Google Patents.
Patent US2833781A successfully refreshed from Google Patents.
US2833781A
Expired / Lapsed
US
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Isothiourea-alkylsulfonates
Assignee: Boehme Fettchemie GmbH
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Filing: 1954-07-13
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Granted: 1958-05-06
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Expires: 1974-07-13
Abstract
No abstract record available.
Inventors
- 👤 Haas Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:38
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE PROCESS OF PRODUCING A COMPOUND HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
116 words
THE PROCESS OF PRODUCING COMPOUNDS SELECTED FROM THE GROUP OF COMPOUNDS HAVING THE STRUCTURAL FORMULAS FIG0-02 WHEREIN R1 IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, PHENYL AND ETHYL, R2 IS HYDROGEN, R3 IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, PHENYL, P-TOLYL AND ETHYL, R4 IS AN ETHYLENE RADICAL AND N IS AN INTEGER FROM 3 TO 4, INCLUSIVE, WHICH COMPRISES REACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE STRUCTURAL FORMULAS FIG03 WHEREIN R1, R2, AND R4 HAVE THE MEANING ABOVE INDICATED. WITH AN ALKYL SULTONE HAVING AN ALKYL CHAIN OF FROM 3 TO 4 CARBON ATOMS, INCLUSIVE, AT SUBSTANTIALLY ROOM TEMPERATURE, AND SEPARATING THE REACTION PRODUCTS FROM THE REACTION MASS.
References Cited (Backward Citations)
US2672463A
Cited
US2695310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |