US1853045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid mixing means
Assignee: Air Conditioning & Eng
•
Filing: 1931-01-09
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Granted: 1932-04-12
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Expires: 1951-01-09
Abstract
No abstract record available.
Inventors
- 👤 Marion G Gnau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:37
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/78; B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F25/3121; Y; Y10; Y10S; Y10S261/00; Y10S261/42; Y10S261/75
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) | 1935-04-12 | 1935-10-12 | 1936-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-12 | 1939-10-12 | 1940-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-12 | 1943-10-12 | 1944-04-12 | $7700.00 | Window Closed / Lapsed |