Patent US2568589A successfully refreshed from Google Patents.
US2568589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the course of the refractive index of an optically nonhomogeneous medium disposed in a cell, particularly an electrophoresis cell
Assignee: Individual
•
Filing: 1948-09-08
•
Granted: 1951-09-18
•
Expires: 1968-09-08
Abstract
No abstract record available.
Inventors
- 👤 Labhart Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/45
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1770355A
Cited
GB355911A
Cited
DE595211C
Cited
GB386315A
Cited
US2256804A
Cited
US2286621A
Cited
US2425758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |