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US2689255A
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Preparation of tert-octyl isot hiocyanate
Assignee: Rohm and Haas Co
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Filing: 1952-02-26
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Granted: 1954-09-14
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Expires: 1972-02-26
Abstract
No abstract record available.
Inventors
- 👤 W E Craig
- 👤 Leo S Luskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:59
CPC Classifications
C; C07; C07C; C07C331/00; C07C331/16; C07C331/18; C07C331/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
THE METHOD OF PREPARING TERT-OCTYL ISOTHIOCYANATE WHICH COMPRISES MIXING DIISOBUTYLENE AND A SOLUBLE INORGANIC THIOCYANATE, TREATING THIS MIXTURE AT A TEMPERATURE BETWEEN ABOUT 20* AND ABOUT 60* C. WITH AQUEOUS SULFURIC ACID OF 40% TO 83% STRENGTH, AND SEPARATING SAID ISOTHIOCYANATE.
Claim 2
Independent Claim
41 words
THE METHOD OF PREPARING TERT-OCTYL ISOTHIOCYANATE WHICH COMPRISES MIXING DIISOBUTYLENE AND A SOLUBLE INORGANIC THIOCYANATE, TREATING THIS MIXTURE AT A TEMPERATURE BETWEEN ABOUT 20* AND ABOUT 60* C. WITH AQUEOUS SULFURIC ACID OF 40% TO 83% STRENGTH, AND SEPARATING SAID ISOTHIOCYANATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |