US2022481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulating and mixing system
Assignee: CHICAGO TELEPHONE SUPPLY Co
•
Filing: 1931-12-02
•
Granted: 1935-11-26
•
Expires: 1951-12-02
Abstract
No abstract record available.
Inventors
- 👤 Newton C Schellenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:01
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/24; B05B7/2486; B05B7/2489; B05B9/00; B05B9/03; B05B9/04; B05B9/0403; B05B9/0416; B05B9/0423; Y; Y10; Y10T; Y10T137/00; Y10T137/794; Y10T137/8593; Y10T137/85954
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1938-11-25 | 1939-05-27 | 1939-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-25 | 1943-05-27 | 1943-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-25 | 1947-05-27 | 1947-11-26 | $7700.00 | Window Closed / Lapsed |