US2174203A
Expired / Lapsed
US
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System for producing a pulsating circulation in apparatus containing gas evolving products
Assignee: Individual
•
Filing: 1938-03-03
•
Granted: 1939-09-26
•
Expires: 1958-03-03
Abstract
No abstract record available.
Inventors
- 👤 Ducellier Gilbert Leon Rene
- 👤 Isman Marcel Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:35
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/34; C12M29/00; C12M29/12; C12M41/00; C12M41/40; C12M41/44; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/313; Y10T137/4456; Y10T137/4643; Y10T137/4666; Y10T137/8593; Y10T137/85954; Y10T137/86389; Y10T137/86405; Y10T137/86413
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) | 1942-09-25 | 1943-03-27 | 1943-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-25 | 1947-03-27 | 1947-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-25 | 1951-03-27 | 1951-09-26 | $7700.00 | Window Closed / Lapsed |