US3219642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infraxred v viewing system
Assignee: —
•
Filing: —
•
Granted: 1965-11-23
•
Expires: 1982-11-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:44
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
IN COMBINATION: AN INFRARED SENSOR; A FIRST OPTICAL SYSTEM INCLUDING ANANNULAR PARABOLIC MIRROR AND A PAIR OF LATERALLY SPACED PLANE MIRRORS FOR ENERGIZING SAID SENSOR WITH INFRARED ENERGY FROM A FIRST SELECTED AREA OF A FIELD TO BE OBSERVED; A SECOND OPTICALSYSTEM COAXIAL WITH AND CONTAINED WITHIN SAID FIRST SYSTEM, AND INCLUDING A PAIR OF CROSSED CYLINDRICAL LENSES O SILVER CHLORIDE, FOR ENERGIZING SAID SENSOR WITH INFRARED ENERGY FROM A SECOND SELECTED AREA OF SAID FIELD WHICH INCLUDES SAID FIRST AREA; A CHOPPER FOR ALTERNTELY AND CYCLICALLY PREVENTING ONE AND THEN THE OTHER OF SAID SYSTEMS FROM ENERGIZING SAID SENSOR;
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |