US2879664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular impactor sampling device
Assignee: Individual
•
Filing: 1955-06-17
•
Granted: 1959-03-31
•
Expires: 1975-06-17
Abstract
No abstract record available.
Inventors
- 👤 Tait George William Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:37
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2202; G01N1/2208; G01N2001/222; G01N2001/2223
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE307692C
Cited
US2284013A
Cited
US2538116A
Cited
US2441042A
Cited
FR1054155A
Cited
US2645941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |