US2354931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering member
Assignee: Individual
•
Filing: 1940-06-24
•
Granted: 1944-08-01
•
Expires: 1960-06-24
Abstract
No abstract record available.
Inventors
- 👤 John A Tolman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:23
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/44; B01D29/46; B01D29/11; B01D29/111; B01D29/48; B01D35/00; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D2239/00; B01D2239/04; B01D2239/0471; B01D2239/0478; B01D2239/06; B01D2239/065; B01D2239/069; B01D2239/0695; Y; Y10; Y10S; Y10S55/00; Y10S55/31; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-08-01 | 1948-01-31 | 1948-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-01 | 1952-01-31 | 1952-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-01 | 1956-01-31 | 1956-08-01 | $7700.00 | Window Closed / Lapsed |