US2925622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard surface treatment for plastics
Assignee: American Optical Corp
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Filing: 1957-12-03
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Granted: 1960-02-23
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Expires: 1977-12-03
Abstract
No abstract record available.
Inventors
- 👤 Mahler Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:35
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J2329/00; C08J2329/02; C08J2329/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE PROCESS OF PROVIDING AN ARTICLE FORMED OF POLYVINYL ALCOHOL MATERIAL WITH IMPROVED SURFACE CHARACTERISTICS COMPRISING PLACING SAID ARTICLE IN DIRECT CONTACT WITH A COMPOSITION EMBODYING EQUAL PARTS OF A SOLUTION WHOSE RELATED PROPORTIONS OF INGREDIENTS ARE EQUIVALENT TO THE COMBINING OF FROM 30 TO 70 GRAMS BORIC ACID CRYSTALS IN 1000 CCS. WATER, AND A SOLUTION CONSISTING OF FROM UNDILUTED COMMERCIAL LIQUID WATER GLASS TO 1 PART COMMERCIAL LIQUID WATER GLASS UPWARDLY TO 3 PARTS WATER FOR A TIME INTERVAL SUFFICIENT TO BRING ABOUT THE DESIRED REACTION OF SAID COMPOSITION WITH THE POLYVINYL ALCOHOL MATERIAL OF SAID ARTICLE, REMOVING SAID MATERIAL FROM SAID COMPOSITION AND THOROUGHLY DRYING THE SAME.
Claim 2
Dependent Claim
110 words
THE PROCESS OF PROVIDING AN ARTICLE FORMED OF POLYVINYL ALCOHOL MATERIAL WITH IMPROVED SURFACE CHARACTERISTICS COMPRISING PLACING SAID ARTICLE IN DIRECT CONTACT WITH A COMPOSITION EMBODYING EQUAL PARTS OF A SOLUTION WHOSE RELATED PROPORTIONS OF INGREDIENTS ARE EQUIVALENT TO THE COMBINING OF FROM 30 TO 70 GRAMS BORIC ACID CRYSTALS IN 1000 CCS. WATER, AND A SOLUTION CONSISTING OF FROM UNDILUTED COMMERCIAL LIQUID WATER GLASS TO 1 PART COMMERCIAL LIQUID WATER GLASS UPWARDLY TO 3 PARTS WATER FOR A TIME INTERVAL SUFFICIENT TO BRING ABOUT THE DESIRED REACTION OF SAID COMPOSITION WITH THE POLYVINYL ALCOHOL MATERIAL OF SAID ARTICLE, REMOVING SAID MATERIAL FROM SAID COMPOSITION AND THOROUGHLY DRYING THE SAME.
References Cited (Backward Citations)
US2111272A
Cited
US2554850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |