Patent FR525080A successfully refreshed from Google Patents.
Patent US2838424A successfully refreshed from Google Patents.
US2838424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of wood
Assignee: American Zinc Lead and Smelting Co
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Filing: 1955-07-20
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Granted: 1958-06-10
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Expires: 1975-07-20
Abstract
No abstract record available.
Inventors
- 👤 Harlan A Depew
- 👤 George R Waitkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:47
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/16; B27K3/22; B27K3/02; B27K3/0278; B27K3/12; B27K3/52; B27K5/00; B27K5/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE PROCESS OF TREATING WOOD, COMPRISING IMPREGNATING PORES OF THE WOOD WITH A SOLUTION OF A WATER SOLUBLE ZINC SALT AND A POTENTIALLY BASIC MATERIAL WHICH IN THE CONDITION IN WHICH IT IS DURING SAID INITIAL IMPREGNATION DOES NOT REACT WITH SAID ZINC SALT, THEREAFTER CONVERTING SAID POTENTIALLY BASIC MATERIAL, IN THE PORES OF THE WOOD, TO A BASIC MATERIAL CAPABLE OF CONVERTING A PART OF THE WATER SOLUBLE ZINC SALT TO ZINC HYDROXIDE ACTING SAID BASIC MATERIAL WITH A PART OF THE WATER SOLUBLE ZINC SALT TO FORM ZINC HYDROXIDE, AND CO-PRECIPITATING THE SAID ZINC HYDROXIDE AND WATER SOLUBLE ZINC SALT IN THE FORM OF A WATER-INSOLUBLE BASIC ZINC SALT, IN PLACE ON THE WALLS OF THE SAID PORES.
Claim 2
Dependent Claim
120 words
THE PROCESS OF TREATING WOOD, COMPRISING IMPREGNATING PORES OF THE WOOD WITH A SOLUTION OF A WATER SOLUBLE ZINC SALT AND A POTENTIALLY BASIC MATERIAL WHICH IN THE CONDITION IN WHICH IT IS DURING SAID INITIAL IMPREGNATION DOES NOT REACT WITH SAID ZINC SALT, THEREAFTER CONVERTING SAID POTENTIALLY BASIC MATERIAL, IN THE PORES OF THE WOOD, TO A BASIC MATERIAL CAPABLE OF CONVERTING A PART OF THE WATER SOLUBLE ZINC SALT TO ZINC HYDROXIDE ACTING SAID BASIC MATERIAL WITH A PART OF THE WATER SOLUBLE ZINC SALT TO FORM ZINC HYDROXIDE, AND CO-PRECIPITATING THE SAID ZINC HYDROXIDE AND WATER SOLUBLE ZINC SALT IN THE FORM OF A WATER-INSOLUBLE BASIC ZINC SALT, IN PLACE ON THE WALLS OF THE SAID PORES.
References Cited (Backward Citations)
US2097509A
Cited
US2637691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |