US2038667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical proportioning and mixing apparatus
Assignee: Individual
•
Filing: 1935-01-26
•
Granted: 1936-04-28
•
Expires: 1955-01-26
Abstract
No abstract record available.
Inventors
- 👤 Herbert P Neff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:03
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/80; B01F33/82; B01F33/821; B01F33/8212; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/8593; Y10T137/86187; Y10T137/86204
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) | 1939-04-28 | 1939-10-28 | 1940-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-28 | 1943-10-28 | 1944-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-28 | 1947-10-28 | 1948-04-28 | $7700.00 | Window Closed / Lapsed |