US3242733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicator device
Assignee: Atlantic Research Corp
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Filing: 1963-07-02
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Granted: 1966-03-29
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Expires: 1983-07-02
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
G; G01; G01K; G01K3/00; G01K3/02; G01K3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A FLUID-TIGHT INDICATOR DEVICE COMPRISING A RESERVOIR CONTAINING A MATERIAL FUSIBLE AT A PREDETERMINED TEMPERATURE, AN INFLEXIBLE, TUBULAR MEMBER CONNECTED AT EACH END TO SAID RESERVOIR TO ENSURE GAS FLOW COMMUNICATION BETWEEN SAID TUBULAR MEMBER AND THE INTERIOR OF SAID RESERVOIR, A WICK OF PREDETERMINED POROSITY CONFINED WITHIN SAID TUBULAR MEMBER SUCH THAT THE PERIPHERAL SURFACE OF SAID WICK IS IN CONTACT WITH THE INTERIOR SURFACE OF SAID TUBULAR MEMBER AND SUCH THAT ONLY ONE END OF SAID WICK IS IN CONTACT WITH THE FUSIBLE MATERIAL WHEN THE TEMPERATURE OF SAID MATERIAL IS EQUAL TO AND GREATER THAN SAID PREDETERMINED TEMPERATURE, AND A SCALE LOCATED ADJACENT TO SAID WICK TO INDICATE THE DEGREE OF MIGRATION OF SAID FUSIBLE MATERIAL THROUGH SAID WICK, SAID SCALE BEING CALIBRATED TO INDICATE THE ELAPSED TIME DURING WHICH SAID MIGRATION OCCURRED.
Claim 2
Dependent Claim
136 words
A FLUID-TIGHT INDICATOR DEVICE COMPRISING A RESERVOIR CONTAINING A MATERIAL FUSIBLE AT A PREDETERMINED TEMPERATURE, AN INFLEXIBLE, TUBULAR MEMBER CONNECTED AT EACH END TO SAID RESERVOIR TO ENSURE GAS FLOW COMMUNICATION BETWEEN SAID TUBULAR MEMBER AND THE INTERIOR OF SAID RESERVOIR, A WICK OF PREDETERMINED POROSITY CONFINED WITHIN SAID TUBULAR MEMBER SUCH THAT THE PERIPHERAL SURFACE OF SAID WICK IS IN CONTACT WITH THE INTERIOR SURFACE OF SAID TUBULAR MEMBER AND SUCH THAT ONLY ONE END OF SAID WICK IS IN CONTACT WITH THE FUSIBLE MATERIAL WHEN THE TEMPERATURE OF SAID MATERIAL IS EQUAL TO AND GREATER THAN SAID PREDETERMINED TEMPERATURE, AND A SCALE LOCATED ADJACENT TO SAID WICK TO INDICATE THE DEGREE OF MIGRATION OF SAID FUSIBLE MATERIAL THROUGH SAID WICK, SAID SCALE BEING CALIBRATED TO INDICATE THE ELAPSED TIME DURING WHICH SAID MIGRATION OCCURRED.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |