Patent US2447031A successfully refreshed from Google Patents.
US2447031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dosing apparatus
Assignee: Individual
•
Filing: 1944-12-08
•
Granted: 1948-08-17
•
Expires: 1964-12-08
Abstract
No abstract record available.
Inventors
- 👤 Harry A Rush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:28
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1044653A
Cited
US1185626A
Cited
US1720326A
Cited
US1897492A
Cited
US1905244A
Cited
US1949934A
Cited
US1943487A
Cited
GB382646A
Cited
GB370842A
Cited
US2049530A
Cited
US2128721A
Cited
US2224101A
Cited
US2302097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |