US2883900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical arrangement for recording of the course of the refractive index in rotating centrifuge cells
Assignee: LKB Produkter Fabriks AB
•
Filing: 1954-02-12
•
Granted: 1959-04-28
•
Expires: 1974-02-12
Abstract
No abstract record available.
Inventors
- 👤 Svensson Svante Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:51
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/45; G01N21/455
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB355911A
Cited
DE595211C
Cited
US2256804A
Cited
FR919843A
Cited
FR923701A
Cited
US2745310A
Cited
US2718811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |