US3263485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining thermal conductivity
Assignee: 3M Co
•
Filing: 1964-01-30
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Granted: 1966-08-02
•
Expires: 1984-01-30
Abstract
No abstract record available.
Inventors
- 👤 Mahmoodi Parviz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:11
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
IN AN APPARATUS FOR DETERMINING THE THERMAL CONDUCTIVITY OF A SOLID MATERIAL BY A COMPARATIVE METHOD, A GUARD TUBE COMPRISING AN OPEN ENDED CYLINDRICAL TUBE PROVIDED WITH AT LEAST ONE CLOSELY WOUND HELICAL GROOVE EXTENDING SUBSTANTIALLY OVER THE ENTIRE OUTER WALL THEREOF, A PLURALITY OF WIRES HELICALLY WOUND AROUND SAID TUBE WITHIN SAID GROOVE AND ARRANGED AS A SUCCESSION OF HEATER COILS WHEREIN EACH SUCCEEDING COIL BEGINS IMMEDIATELY FOLLOWING THE TERMINATION OF A PRECEDING COIL, INWARDLY EXTENDING SUPPORT MEANS CARRIED BY THE GUARD TUBE AND THERMOCOUPLES MOUNTED ON THE SUPPORT MEANS AND POSITIONED TO TRANSVERSELY ALIGN CENTRALLY WITH EACH COIL.
References Cited (Backward Citations)
US3043128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |