US2622470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and system for indicating the light modulation in a transparent medium
Assignee: Individual
•
Filing: 1948-01-07
•
Granted: 1952-12-23
•
Expires: 1968-01-07
Abstract
No abstract record available.
Inventors
- 👤 Robert H Rines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:20
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/11
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1694661A
Cited
GB299884A
Cited
US1792752A
Cited
US1921852A
Cited
US1740673A
Cited
US1997371A
Cited
US2064289A
Cited
US1954947A
Cited
FR752910A
Cited
US2155659A
Cited
DE717747C
Cited
US2289205A
Cited
US2234329A
Cited
US2418964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |