US1946474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic fluid feed proportioning method and apparatus
Assignee: Individual
•
Filing: 1929-03-16
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Granted: 1934-02-13
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Expires: 1949-03-16
Abstract
No abstract record available.
Inventors
- 👤 Reginald M Banks
- 👤 John H Banks
- 👤 Burritt Elizabeth Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:59
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; B; B01; B01F; B01F25/00; B01F25/30; B01F25/32; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0363; Y10T137/2496; Y10T137/2499; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7884; Y10T137/8593; Y10T137/8597
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) | 1937-02-12 | 1937-08-14 | 1938-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-12 | 1941-08-14 | 1942-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-12 | 1945-08-14 | 1946-02-13 | $7700.00 | Window Closed / Lapsed |