US2290599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical feeding device
Assignee: Individual
•
Filing: 1939-10-11
•
Granted: 1942-07-21
•
Expires: 1959-10-11
Abstract
No abstract record available.
Inventors
- 👤 Irvin G Mcchesney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:54
CPC Classifications
B; B01; B01J; B01J4/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/034; Y10T137/0368; Y10T137/2496; Y10T137/2499; Y10T137/2509; Y10T137/6851; Y10T137/7039; Y10T137/8158; Y10T137/8175; Y10T137/8593; Y10T137/86276; Y10T137/86292
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) | 1945-07-20 | 1946-01-19 | 1946-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-20 | 1950-01-19 | 1950-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-20 | 1954-01-19 | 1954-07-21 | $7700.00 | Window Closed / Lapsed |