US2171579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid control system
Assignee: Individual
•
Filing: 1935-10-28
•
Granted: 1939-09-05
•
Expires: 1955-10-28
Abstract
No abstract record available.
Inventors
- 👤 Matthew H Loughridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:10
CPC Classifications
F; F17; F17C; F17C7/00; F17C7/02; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0326; F17C2223/00; F17C2223/01; F17C2223/0107; F17C2223/013; F17C2227/00; F17C2227/01; F17C2227/0114; F17C2250/00; F17C2250/06; F17C2250/0605; F17C2250/0636; F17C2250/0673; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/272; Y10T137/2733; Y10T137/2842; Y10T137/2849; Y10T137/2877; Y10T137/7722; Y10T137/7781; Y10T137/8593; Y10T137/86187; Y10T137/86389; Y10T137/86405
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) | 1942-09-04 | 1943-03-06 | 1943-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-04 | 1947-03-06 | 1947-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-04 | 1951-03-06 | 1951-09-05 | $7700.00 | Window Closed / Lapsed |