US2939844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a catalyst for the reaction between acetylene and formaldehyde to form 2-butyne-1:4-diol
Assignee: BOC Group Ltd
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Filing: 1957-04-01
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Granted: 1960-06-07
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Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 Ellinger Leo Philipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:34
CPC Classifications
C; C07; C07C; C07C33/00; C07C33/04; C07C33/042; C07C33/044; C07C33/046; B; B01; B01J; B01J23/00; B01J23/70; B01J23/72; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2286; B01J2231/00; B01J2231/30; B01J2231/34; B01J2231/341; B01J2231/342; B01J2531/00; B01J2531/10; B01J2531/16; B01J31/26; B01J31/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE PROCESS FOR PREPARING A CATALYST CAPABLE OF CATALYSING THE REACTION BETWEEN ACETYLENE AND FORMALDEHYDE TO FORM BUTYNE-1:4-DIOL WHICH COMPRISES THE STEPS OF PREPARING A MATERIAL CONTAINING 15-60% BY WEIGHT OF COPPER BY MIXING A SOLUTION OF COPPER NITRATE, A SOLUTION OF AN ALKALI METAL SILICATE, AND A SOLUTION OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE AND AMMONIUM HYDROXAND SUBSEQUENTLY CONVERTING THE MATERIAL TO THE CATALYST BY TREATMENT WITH ACETYLENE IN THE PRESENCE OF FORMALDEHYDE.
Claim 2
Dependent Claim
81 words
THE PROCESS FOR PREPARING A CATALYST CAPABLE OF CATALYSING THE REACTION BETWEEN ACETYLENE AND FORMALDEHYDE TO FORM BUTYNE-1:4-DIOL WHICH COMPRISES THE STEPS OF PREPARING A MATERIAL CONTAINING 15-60% BY WEIGHT OF COPPER BY MIXING A SOLUTION OF COPPER NITRATE, A SOLUTION OF AN ALKALI METAL SILICATE, AND A SOLUTION OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE AND AMMONIUM HYDROXAND SUBSEQUENTLY CONVERTING THE MATERIAL TO THE CATALYST BY TREATMENT WITH ACETYLENE IN THE PRESENCE OF FORMALDEHYDE.
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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |