US2549866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for visual detection of illuminated suspended matter in fluids
Assignee: Specialties Development Corp
•
Filing: 1944-12-23
•
Granted: 1951-04-24
•
Expires: 1964-12-23
Abstract
No abstract record available.
Inventors
- 👤 Uhl Arthur William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:05
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/29
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR852120A
Cited
US894499A
Cited
US1516608A
Cited
US1648369A
Cited
US1807659A
Cited
GB333732A
Cited
FR728032A
Cited
DE579790C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |