US2422647A
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US
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Assignee: Vokes Ltd
•
Filing: 1940-07-09
•
Granted: 1947-06-17
•
Expires: 1960-07-09
Abstract
No abstract record available.
Inventors
- 👤 Vokes Cecil Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:18
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/23; B01D29/50; B01D29/52; B01D2201/00; B01D2201/46; Y; Y10; Y10S; Y10S210/00; Y10S210/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1506967A
Cited
US1906417A
Cited
US1805450A
Cited
US2108798A
Cited
US2076935A
Cited
US2098725A
Cited
US2230174A
Cited
US2271054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |