Patent US3495440A successfully refreshed from Google Patents.
US3495440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air sampler devices
Assignee: United States Department of the Army
•
Filing: 1968-04-23
•
Granted: 1970-02-17
•
Expires: 1988-04-23
Abstract
No abstract record available.
Inventors
- 👤 Abraham Koblin
- 👤 Alfred L Woolridge
- 👤 Robert W Dorsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:41
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/06; G01N15/065
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |