US2612814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential refractometer
Assignee: EIDP Inc
•
Filing: 1948-05-26
•
Granted: 1952-10-07
•
Expires: 1968-05-26
Abstract
No abstract record available.
Inventors
- 👤 Leo G Glasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:31
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)
US1905251A
Cited
US2114867A
Cited
US2136682A
Cited
US2139474A
Cited
US2385503A
Cited
US2427996A
Cited
US2413208A
Cited
US2483102A
Cited
US2445044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |