Patent US2810315A successfully refreshed from Google Patents.
US2810315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential refractometer cell assembly
Assignee: Phillips Petroleum Co
•
Filing: 1953-05-11
•
Granted: 1957-10-22
•
Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Elmer C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:08
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/4133
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2015949A
Cited
US2299529A
Cited
US2427996A
Cited
US2612814A
Cited
US2624014A
Cited
US2686454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |