US2656508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for counting particles suspended in a fluid
Assignee: Individual
•
Filing: 1949-08-27
•
Granted: 1953-10-20
•
Expires: 1969-08-27
Abstract
No abstract record available.
Inventors
- 👤 Wallace H Coulter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:39
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/1031; G01N15/12; G01N15/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1070556A
Cited
US1168227A
Cited
US1995492A
Cited
US2122363A
Cited
US2262370A
Cited
US2349992A
Cited
US2492768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |