Patent US3348408A successfully refreshed from Google Patents.
US3348408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reference source for calibration of thermographic instruments
Assignee: Barnes Engineering Co
•
Filing: 1965-04-01
•
Granted: 1967-10-24
•
Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Nelson E Engborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:37
CPC Classifications
G; G01; G01K; G01K15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A REFERENCE BLACK BODY SOURCE FOR INFRARED INSTRUMENTS COMPRISING IN COMBINATION, (A) A LIQUID-TIGHT OPEN-TOP CONTAINER WITH INSULATED WALLS FILLED WITH A LIQUID AT CALIBRATING TEMPERATURE, (B) A COVER FOR CLOSING THE TOP OF SAID CONTAINER, SAID COVER HAVING AN OPENING WITH A DOWNWARDLY PROJECTING CLOSED END TUBE OF CROSS SECTION SMALL IN COMPARISON WITH THE CROSS SECTION OF THE CONTAINER, THE INNER SURFACE OF THE TUBE BEING OF HIGH EMISSIVITY FOR AT LEAST THE MAJOR PORTION OF ITS LENGTH FROM THE CLOSED END, WHICH PROJECTS INTO THE CENTER OF THE CONTAINER, AND (C) THERMOMETRIC MEANS FOR ACCURATELY MEASURING THE TEMPERATURE OF ANY LIQUID INTRODUCED INTO THE CONTAINER.
Claim 2
Dependent Claim
108 words
A REFERENCE BLACK BODY SOURCE FOR INFRARED INSTRUMENTS COMPRISING IN COMBINATION, (A) A LIQUID-TIGHT OPEN-TOP CONTAINER WITH INSULATED WALLS FILLED WITH A LIQUID AT CALIBRATING TEMPERATURE, (B) A COVER FOR CLOSING THE TOP OF SAID CONTAINER, SAID COVER HAVING AN OPENING WITH A DOWNWARDLY PROJECTING CLOSED END TUBE OF CROSS SECTION SMALL IN COMPARISON WITH THE CROSS SECTION OF THE CONTAINER, THE INNER SURFACE OF THE TUBE BEING OF HIGH EMISSIVITY FOR AT LEAST THE MAJOR PORTION OF ITS LENGTH FROM THE CLOSED END, WHICH PROJECTS INTO THE CENTER OF THE CONTAINER, AND (C) THERMOMETRIC MEANS FOR ACCURATELY MEASURING THE TEMPERATURE OF ANY LIQUID INTRODUCED INTO THE CONTAINER.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |