US2928791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature indicators
Assignee: Individual
•
Filing: 1957-06-20
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Granted: 1960-03-15
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Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Loconti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/06; C; C09; C09D; C09D5/00; C09D5/26; G01K11/12; Y; Y10; Y10S; Y10S252/00; Y10S252/962
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
A COMPOSITION OF MATTER FOR IRREVERSIBLY INDICATING IN UPWARD CHANGE IN THERMAL CONDITIONS, COMPRISING AN INTIMATE MIXTURE OF A FINELY DIVIDED SUBSTANTIALLY WATERSOLUBLE COLORED CRYSTALLINE ORGANIC COMPOUND HAVING A SHARPLY DEFINED MELTING POINT OF AT LEAST 45*C., AN INORGANIC PIGMENT OF A CONTRASTING COLOR AS A CARRIER THEREFOR, SAID INORGANIC PIGMENT BEING NON-REACTIVE WITH SAID ORGANIC COMPOUND IN THE SOLID PHASE, AN UNCOLORED WATER-SOLUBLE BINDER, AND ENOUGH WATER TO PRODUCE A SLURRY, SAID SLURRY BEING GROUND TOGETHER TO FORM A COLORED DISPERSION ADAPTED FOR APPLICATION AS A COATING, WHEREBY WHEN SAID COATING IS EXPOASED TO A TEMPERATURE SUBSTANTIALLY CORRESPONDING TO THE MELTING POING OF SAID ORGANIC COMPOUND, SAID ORGANIC COMPOUND MELTS AID IS ABSORBED BY SAID CARRIER, WHICH RESULTS IN A READILY OBSERVABLE IRREVERSIBLE CHANGE OF THE APPEARANCE THEREOF.
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |