US3355949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal temperature and pressure transucer
Assignee: Individual
•
Filing: 1964-08-17
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Granted: 1967-12-05
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Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 Albert A Elwood
- 👤 Ronald I Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:38
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/0092; G01K; G01K7/00; G01K7/32; G01L9/00; G01L9/0001; G01L9/0008; G01L9/0022
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
THE METHOD OF MEASURING TEMPERATURE AND PRESSURE INCLUDING THE STEPS OF (A) INSERTING AT LEAST TWO QUARTZ CRYSTALS OF KNOWN FREQUENCY-TEMPERATURE CHARACTERISTICS INTO THE MATERIAL BEING MEASURED, (B) PROTECTING SAID CRYSTALS FROM THE EFFECTS OF PRESSURE, (C) EXPOSING SAID CRYSTAL TO THE EFFECTS TO TEMPEARTURE, (D) INSERTING A THIRD QUARTZ CRYSTAL OF THE SAME FREQUENCY-TEMPERATURE CHARACTERISTICS OF ONE OF SAID FIRST CRYSTALS, (E) EXPOSING SAID THIRD CRYSTAL TO THE EFFECTS OF BOTH TEMPERATURE AND PRESSURE, (F) MIXING THE OUTPUT FREQUENCIES OF OSCILLATORS CONTROLLED BY EACH OF THE FRIST TWO CRYSTALS AND INTERPRETING THE DIFFERENCE FREQUENCY TO INDICATE THE TEMPERATURE OF THE MATERIAL, AND (G) MIXING THE OUTPUT FREQUENCIES OF OSCILLATORS CONTROLLED BY THE THIRD CRYSTAL AND THE CRYSTAL OF THE FIRST TWO WHICH HAS THE SAME FREQUENCY-TEMPERATURE CHAR-
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |