US3019404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermistors and methods of making same
Assignee: BULOVA RES AND DEV LAB Inc
•
Filing: 1955-12-22
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Granted: 1962-01-30
•
Expires: 1975-12-22
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Fastenau
- 👤 Seymour C Spielberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:35
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A THERMISTOR STRUCTURE COMPRISING A CERAMIC BACKING CONSTITUTED BY A DENSELY COMPACTED ALUMINUM OXIDE BLOCK, AND A FLAKE OF THERMALLY SENSITIVE RESISTANCE MATERIAL INTIMATELY BONDED TO THE SURFACE OF SAID BACKING BY SINTERING, SAID BOND BETWEEN SAID BACKING BEING FREE OF AN INTERMEDIATE ADHESIVE.
Claim 2
Dependent Claim
44 words
A THERMISTOR STRUCTURE COMPRISING A CERAMIC BACKING CONSTITUTED BY A DENSELY COMPACTED ALUMINUM OXIDE BLOCK, AND A FLAKE OF THERMALLY SENSITIVE RESISTANCE MATERIAL INTIMATELY BONDED TO THE SURFACE OF SAID BACKING BY SINTERING, SAID BOND BETWEEN SAID BACKING BEING FREE OF AN INTERMEDIATE ADHESIVE.
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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) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |