Patent US2746994A successfully refreshed from Google Patents.
US2746994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of dithio-dialkylene glycols
Assignee: ATK Launch Systems LLC
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Filing: 1955-04-05
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Granted: 1956-05-22
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Expires: 1975-04-05
Abstract
No abstract record available.
Inventors
- 👤 Warren D Helmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:38
CPC Classifications
C; C07; C07C; C07C323/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE METHOD OF MAKING A DITHIODIALKYLENE GLYCOL WHICH COMPRISES REACTING AN ALKYLENE OXIDE, IN AN AQUEOUS SOLUTION, WITH AN ALKALINE THIOSULFATE, A WATER-SOLUBLE ALKALINE MONOSULFIDE, AND SUFFICIENT WATER-SOLUBLE ACIDIC MATERIAL FOR SUBSTANTIALLY NEUTRALIZING THE ALKALINE HYDROXIDE FORMED IN THE REACTION.
Claim 2
Independent Claim
40 words
THE METHOD OF MAKING A DITHIODIALKYLENE GLYCOL WHICH COMPRISES REACTING AN ALKYLENE OXIDE, IN AN AQUEOUS SOLUTION, WITH AN ALKALINE THIOSULFATE, A WATER-SOLUBLE ALKALINE MONOSULFIDE, AND SUFFICIENT WATER-SOLUBLE ACIDIC MATERIAL FOR SUBSTANTIALLY NEUTRALIZING THE ALKALINE HYDROXIDE FORMED IN THE REACTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |