US2527358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of purifying propargyl alcohol
Assignee: GAF Chemicals Corp
•
Filing: 1948-12-29
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Granted: 1950-10-24
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Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 Fahnoc Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:04
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C29/82; C07C29/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
IN THE PROCESS FOR THE PURIFICATION OF PROPARGYL ALCOHOL OBTAINED AS A BI-PRODUCT FROM BUTYNEDIOL SYNTHESIS, THE STEP OF REMOVING FORMALDEHYDE REACTION PRODUCTS WHICH COMPRISES DISTILLING A SOLUTION OF PROPARGYL ALCOHOL IN WATER WITH ACIDIFIED METHANOL, REMOVING THE OVERHEAD AND LEAVING THE PURIFIED PROPARGYL ALCOHOL WATER SOLUTION.
Claim 2
Dependent Claim
47 words
IN THE PROCESS FOR THE PURIFICATION OF PROPARGYL ALCOHOL OBTAINED AS A BI-PRODUCT FROM BUTYNEDIOL SYNTHESIS, THE STEP OF REMOVING FORMALDEHYDE REACTION PRODUCTS WHICH COMPRISES DISTILLING A SOLUTION OF PROPARGYL ALCOHOL IN WATER WITH ACIDIFIED METHANOL, REMOVING THE OVERHEAD AND LEAVING THE PURIFIED PROPARGYL ALCOHOL WATER SOLUTION.
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) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |