US2470116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of compounds by crystallization
Assignee: Beazer East Inc
•
Filing: 1946-10-19
•
Granted: 1949-05-17
•
Expires: 1966-10-19
Abstract
No abstract record available.
Inventors
- 👤 Swietoslawski Wojclech
- 👤 John R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:24
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/50; C07D333/52; C07D333/54; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0036; C07C; C07C51/00; C07C51/42; C07C51/43; C07C7/00; C07C7/14
Claims Analysis
Total Claims: 0
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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) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |