Patent US2981640A successfully refreshed from Google Patents.
US2981640A
Expired / Lapsed
US
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Process of preparing bactericidal article and the resulting article
Assignee: Permachem Corp
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Filing: 1955-10-28
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Granted: 1961-04-25
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Expires: 1975-10-28
Abstract
No abstract record available.
Inventors
- 👤 William H Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:11
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/23; A61L2/238
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
IN A PROCESS OF PREPARATION OF A BACTERICIDAL ARTICLE LASTINGLY LETHAL TO BACTERIA COMING INTO CONTACT THEREWITH, THE STEPS OF: WETTING SAID ARTICLE WITH AN AQUEOUS SOLUTION CONTAINING ESSENTIALLY A WATER-SOLUBLE THIOCYANATE, SILVER CATIONS, AND THIOCYANATE CATIONS, AND PRECIPITATING IN SITU FROM SAID AQUEOUS SOLUTION A BACTERICIDAL AMOUNT OF A WATER-INSOLUBLE LIGHT-STABLE SILVER THIOCYANATE ON SAID ARTICLE.
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |