US2945864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing acetal and acetal-like compounds
Assignee: Dow Chemical Co
•
Filing: 1958-03-21
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Granted: 1960-07-19
•
Expires: 1978-03-21
Abstract
No abstract record available.
Inventors
- 👤 Nicholas B Lorette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:28
CPC Classifications
C; C08; C08G; C08G65/00; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/18; C07D307/20; C07D319/00; C07D319/10; C07D319/12; C08G2/00; C08G2/18; C08G2/24; C08G4/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
A PROCESS FOR THE PREPARATION OF 2,3-BIS-(4-CHLOROBUTOXY)-P-DIOXANE WHICH COMPRISES THE STEPS OF CONTACTING TETRAHYDROFURAN AND 2,3-DICHLORO-P-DIOXANE AT A TEMPERATURE OF FROM 50*-125*C. AND IN THE PRESENCE OF ABOUT 2 TO 20 MOLE PERCENT OF ZINC CHLORIDE.
Claim 2
Dependent Claim
36 words
A PROCESS FOR THE PREPARATION OF 2,3-BIS-(4-CHLOROBUTOXY)-P-DIOXANE WHICH COMPRISES THE STEPS OF CONTACTING TETRAHYDROFURAN AND 2,3-DICHLORO-P-DIOXANE AT A TEMPERATURE OF FROM 50*-125*C. AND IN THE PRESENCE OF ABOUT 2 TO 20 MOLE PERCENT OF ZINC CHLORIDE.
Claim 3
Dependent Claim
26 words
A PROCESS FOR THE PREPARATION OF AN ALPHA (4-CHOLORBUTOXY) ETHER WHICH COMPRISES THE STEPS OF CONTACTING TETRAHYDROFURAN WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 4
Dependent Claim
26 words
A PROCESS FOR THE PREPARATION OF AN ALPHA (4-CHOLORBUTOXY) ETHER WHICH COMPRISES THE STEPS OF CONTACTING TETRAHYDROFURAN WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
US2532044A
Cited
US2667516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |