Patent US3976082A successfully refreshed from Google Patents.
US3077539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation reference standard
Assignee: Arthur D Little Inc
•
Filing: 1961-08-28
•
Granted: 1963-02-12
•
Expires: 1981-08-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry H Blau
- 👤 Richard S Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:42
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/52; G01J5/53; G01J1/00; G01J1/02; G01J1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
RADIATION STANDARD CAPABLE OF EMITTING A CLOSELY REPRODUCIBLE LEVEL OF RADIANT ENERGY, COMPRISING A BODY OF MATERIAL ADAPTED TO BE PERIODICALLY HEATED ABOVE A POINT AT WHICH A PHASE TRANSITION TAKES PLACE, SAID MATERIAL BEING ONE WHICH, DURING COOLING TO A TEMPERATURE BELOW SAID POINT, EXHIBITS A CHARACTERISTIC COOLING CURVE HAVING A PLATEAU CORRESPONDING TO A PREDETERMINED REPRODUCIBLE TEMPERATURE; MEANS FOR PERIODICALLY HEATING SAID BODY ABOVE ITS TRANSITION POINT; RADIANT ENERGY EMITTING MEANS ASSOCIATED WITH AND IN HEAT EXCHANGE CONTACT WITH SAID BODY AND ADAPTED TO BE HEATED BY SAID BODY THEREBY TO EMIT RADIANT ENERGY AT A REPRODUCIBLE LEVEL; INSULATION MEANS SURROUNDING SAID RADIANT ENERGY EMITTING MEANS THEREBY MINIMIZING HEAT TRANSFER OUTWARDLY FROM SAID BODY TO THE ATMOSPHERE.
Claim 2
Dependent Claim
119 words
RADIATION STANDARD CAPABLE OF EMITTING A CLOSELY REPRODUCIBLE LEVEL OF RADIANT ENERGY, COMPRISING A BODY OF MATERIAL ADAPTED TO BE PERIODICALLY HEATED ABOVE A POINT AT WHICH A PHASE TRANSITION TAKES PLACE, SAID MATERIAL BEING ONE WHICH, DURING COOLING TO A TEMPERATURE BELOW SAID POINT, EXHIBITS A CHARACTERISTIC COOLING CURVE HAVING A PLATEAU CORRESPONDING TO A PREDETERMINED REPRODUCIBLE TEMPERATURE; MEANS FOR PERIODICALLY HEATING SAID BODY ABOVE ITS TRANSITION POINT; RADIANT ENERGY EMITTING MEANS ASSOCIATED WITH AND IN HEAT EXCHANGE CONTACT WITH SAID BODY AND ADAPTED TO BE HEATED BY SAID BODY THEREBY TO EMIT RADIANT ENERGY AT A REPRODUCIBLE LEVEL; INSULATION MEANS SURROUNDING SAID RADIANT ENERGY EMITTING MEANS THEREBY MINIMIZING HEAT TRANSFER OUTWARDLY FROM SAID BODY TO THE ATMOSPHERE.
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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |