Patent US3352794A successfully refreshed from Google Patents.
US3352794A
Expired / Lapsed
US
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Process for making a temperature sensitive color reversible pigment and resulting product
Assignee: Boeing Co
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Filing: 1964-07-07
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Granted: 1967-11-14
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Expires: 1984-07-07
Abstract
No abstract record available.
Inventors
- 👤 Daniel A Abdo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:05
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/38; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2006/00; C01P2006/60; Y; Y10; Y10S; Y10S252/00; Y10S252/962
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
A COMPOSITION OF MATTER HAVING REVERSIBLE TEMPERATURE-DEPENDENT COLOR CHARACTERISTICS COMPRISED OF AN IMPURE IODIDE OF SILVER AND MERCURY WHEREIN THE MOLECULAR RATIO OF SILVER IODIDE TO MERCURIC IODIDE VARIES FROM 4.0 TO 80.0 AND THE IMPURITY IS A COMPOUND PROVIDING A SOURCE OF NITRATE IONS.
Claim 2
Dependent Claim
45 words
A COMPOSITION OF MATTER HAVING REVERSIBLE TEMPERATURE-DEPENDENT COLOR CHARACTERISTICS COMPRISED OF AN IMPURE IODIDE OF SILVER AND MERCURY WHEREIN THE MOLECULAR RATIO OF SILVER IODIDE TO MERCURIC IODIDE VARIES FROM 4.0 TO 80.0 AND THE IMPURITY IS A COMPOUND PROVIDING A SOURCE OF NITRATE IONS.
Claim 3
Dependent Claim
70 words
A PROCESS FOR MAKING A REVERSIBLE TEMPERATURE-DEPENDENT COLOR CHARACTERISTIC COMPOSITION COMPRISING THE STEPS OF (A) REACTING IONIZED SILVER NITRATE AND POTASSIUM IODIDE WHICH RESULTS IN A DISTINGUISHABLE PRECIPITATE, (B) AGING THE PRECIPITATE UNTIL AN OLIVE DRAB COLOR RESULTS, (C) REACTING THE PRECIPITATE WITH MERCURIC IODIDE, AND (D) CYCLING THE TEMPERATURE OF THE REACTION PRODUCT OF STEP (C) BELOW ITS DECOMPOSITION TEMPERATURE THUS SETTING THE COLOR CHANGES OF THE REACTION PRODUCT.
Claim 4
Dependent Claim
70 words
A PROCESS FOR MAKING A REVERSIBLE TEMPERATURE-DEPENDENT COLOR CHARACTERISTIC COMPOSITION COMPRISING THE STEPS OF (A) REACTING IONIZED SILVER NITRATE AND POTASSIUM IODIDE WHICH RESULTS IN A DISTINGUISHABLE PRECIPITATE, (B) AGING THE PRECIPITATE UNTIL AN OLIVE DRAB COLOR RESULTS, (C) REACTING THE PRECIPITATE WITH MERCURIC IODIDE, AND (D) CYCLING THE TEMPERATURE OF THE REACTION PRODUCT OF STEP (C) BELOW ITS DECOMPOSITION TEMPERATURE THUS SETTING THE COLOR CHANGES OF THE REACTION PRODUCT.
References Cited (Backward Citations)
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US2163918A
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US2637657A
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US2945305A
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US2723914A
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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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |