US3137794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directionally sensitive light detector
Assignee: Individual
•
Filing: 1960-06-28
•
Granted: 1964-06-16
•
Expires: 1980-06-28
Abstract
No abstract record available.
Inventors
- 👤 Harold H Seward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:01
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/02; G01J1/04; G01B; G01B11/00; G01B11/26; G01J1/0407; G01J1/0477; G01J1/42; G01J1/4228
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
ELECTRO-OPTICAL APPARATUS COMPRISING A REFRACTIVE ELEMENT HAVING A FIRST SURFACE ADAPTED TO RECEIVE EXTERNALLY INCIDENT ILLUMINATION AND SECOND AND THIRD MUTUALLY INTERSECTING PLANAR SURFACE EACH INTERSECTING SAID FIRST SURFACE AT THE CRITICAL ANGLE, AND FIRST AND SECOND PHOTOSENSITIVE MEANS ADAPTED SELECTIVELY TO RECEIVE SUCH OF SAID INCIDENT ILLUMINATION AS EMERGES FROM SAID SECOND AND THIRD SURFACES, RESPECTIVELY.
Claim 2
Dependent Claim
57 words
ELECTRO-OPTICAL APPARATUS COMPRISING A REFRACTIVE ELEMENT HAVING A FIRST SURFACE ADAPTED TO RECEIVE EXTERNALLY INCIDENT ILLUMINATION AND SECOND AND THIRD MUTUALLY INTERSECTING PLANAR SURFACE EACH INTERSECTING SAID FIRST SURFACE AT THE CRITICAL ANGLE, AND FIRST AND SECOND PHOTOSENSITIVE MEANS ADAPTED SELECTIVELY TO RECEIVE SUCH OF SAID INCIDENT ILLUMINATION AS EMERGES FROM SAID SECOND AND THIRD SURFACES, RESPECTIVELY.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |