US2102584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic proportioning device
Assignee: Individual
•
Filing: 1936-07-01
•
Granted: 1937-12-21
•
Expires: 1956-07-01
Abstract
No abstract record available.
Inventors
- 👤 Brown Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:25
CPC Classifications
F; F04; F04B; F04B19/00; F04B19/08; F04B19/10; B; B28; B28C; B28C7/00; B28C7/04; B28C7/0404; B28C7/0413
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) | 1940-12-20 | 1941-06-21 | 1941-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-12-20 | 1945-06-21 | 1945-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-12-20 | 1949-06-21 | 1949-12-21 | $7700.00 | Window Closed / Lapsed |