US3090236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature indicating devices
Assignee: National Research Development Corp UK
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Filing: 1961-10-02
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Granted: 1963-05-21
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Expires: 1981-10-02
Abstract
No abstract record available.
Inventors
- 👤 Nicol Donald Laurence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:20
CPC Classifications
G; G01; G01K; G01K3/00; G01K3/02; G01K3/04; G01K11/00; G01K11/06; G01K11/12; G01K5/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
A TEMPERATURE INDICATING DEVICE COMPRISING A VESSEL HAVING A TRANSPICUOUS WALL, AT LEAST ONE SEPARATOR DIVIDING SAID VESSEL INTO SEPARATE COMPARTMENTS, SAID SEPARATOR BEING COMPOSED OF A SUBSTANCE WHICH MELTS AT A TEMPERATURE REQUIRED TO BE INDICATED, AND LIQUIDS IN SAID COMPARTMENTS WHICH UPON MIXING CHANGE IN APPEARNCE.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |