US2604439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation of
Assignee: —
•
Filing: —
•
Granted: 1952-07-22
•
Expires: 1969-07-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:05
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/383; C07C17/386; C07C7/00; C07C7/04; C07C7/05; C07C7/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
THE PROCESS FOR PURIFYING A 2-ALKENYL CHLORIDE HAVINNG FOUR CARBON ATOMS TO THE MOLECULE CONTAMINATED BY THE PRESENCE THEREIN OF A 1ALKENYL CHLORIDE THE BOILING TEMPERATURE OF WHICH CLOSELY APPROXIMATES THAT OF SAID 2-ALKENYL CHLORIDE WHICH COMPRISES THE STEP OF DISTILLING SAID CONTAMINATED 2-ALKENYL CHLORIDE IN THE PRESENCE OF AN AMOUNT OF ACETONE SUBSTANTIAALLY EXCEEDING THE WEIGHT OF 1-ALKENYL CHLORIDE IN SAID CONTAMINATED 2-ALKENYL CHLORIDE,
References Cited (Backward Citations)
US2042223A
Cited
US2212810A
Cited
US2293317A
Cited
US2372941A
Cited
US2452797A
Cited
US2445738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |