Patent US2859620A successfully refreshed from Google Patents.
US2859620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic constant rate sample feeder
Assignee: Standard Oil Co
•
Filing: 1955-12-29
•
Granted: 1958-11-11
•
Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Rhodes
- 👤 John P Segers
- 👤 Anthony V Lacko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:47
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2937; Y10T137/2947; Y10T137/2965
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) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |