Patent US3288718A successfully refreshed from Google Patents.
US3288718A
Expired / Lapsed
US
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Sterilization indicator coating
Assignee: United States Envelope Co
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Filing: 1963-11-26
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Granted: 1966-11-29
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Expires: 1983-11-26
Abstract
No abstract record available.
Inventors
- 👤 Carumpalos Constantine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:30
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/226
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A COMPOSITION FOR PRINTING TELLTALE INSIGNIA INDICATING, BY A CHANGE IN COLOR, THAT STERILIZATION CONDITIONS HAVE BEEN ATAINED WHICH COMPRISES, BY WEIGHT, APPROXIMATELY 20% PARTIALLY HYDROLYZED POLYVINYL ALCOHOL, APPROXIMATELY 40% WATER, APPROXIMATELY 10% OF A LEUCO ESTER OF AN ANTHRAQUINONOID TYPE VAT DYE, APPROXIMATELY 15% OF A CATALYST COMPRISING AN ACID SPLITTING AGENT, AN OXIDIZING AGENT, AND AN ALKALI, APPROXIMATELY 15% ANHYDROUS ETHYL ALCOHOL, AN ANTIFOAM AGENT, AND A MONO-VALENT TERTIARY AMINE.
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |