US2868673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of materials
Assignee: American Zinc Lead and Smelting Co
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Filing: 1958-03-07
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Granted: 1959-01-13
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Expires: 1978-03-07
Abstract
No abstract record available.
Inventors
- 👤 Harlan A Depew
- 👤 Patrick D Quinn
- 👤 George R Waitkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:24
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06M11/56; B; B27; B27K; B27K3/00; B27K3/16; B27K3/22; B27K3/32; D06M11/07; D06M11/11; D06M11/155; D06M11/32; D06M11/36; D06M11/44; D06M11/47; D06M11/68; D06M11/70; D06M11/71; D06M11/80; D06M11/82; B27K2240/00; B27K2240/30; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31989; Y10T428/31993; Y10T428/31996; Y10T442/00; Y10T442/20; Y10T442/2033; Y10T442/2525; Y10T442/2631
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE PROCESS OF TREATING CELLULOSIC MATERIAL COMPRISING IMPREGNATING THE MATERIAL, IN SEPARATE STEPS, WITH A SOLUTION OF A WATER SOLUBLE ZINC SALT AND WITH A REACTANT WHICH PRODUCES, WITH A PORTION OF SAID WATER SOLUBLE ZINC SALT, ZINC HYDROXIDE, AND CO-PRECIPITATING THE ZINC HYDROXIDE AND RESIDUAL WATER SOLUBLE ZINC SALT, IN THE FORM OF WATER-INSOLUBLE BASIC ZINC SALT, IN SITU.
Claim 2
Dependent Claim
60 words
THE PROCESS OF TREATING CELLULOSIC MATERIAL COMPRISING IMPREGNATING THE MATERIAL, IN SEPARATE STEPS, WITH A SOLUTION OF A WATER SOLUBLE ZINC SALT AND WITH A REACTANT WHICH PRODUCES, WITH A PORTION OF SAID WATER SOLUBLE ZINC SALT, ZINC HYDROXIDE, AND CO-PRECIPITATING THE ZINC HYDROXIDE AND RESIDUAL WATER SOLUBLE ZINC SALT, IN THE FORM OF WATER-INSOLUBLE BASIC ZINC SALT, IN SITU.
References Cited (Backward Citations)
US1318523A
Cited
US831450A
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US1337380A
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US1846185A
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US2097509A
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US2637691A
Cited
US2769730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |