US2573252A
Expired / Lapsed
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Process for preparing cupric ammonium arsenite solutions
Assignee: Timber Engineering Co
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Filing: 1949-05-24
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Granted: 1951-10-30
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Expires: 1969-05-24
Abstract
No abstract record available.
Inventors
- 👤 Farber Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:52
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/14; B; B27; B27K; B27K3/00; B27K3/16; B27K3/20; B27K3/22; B27K3/32; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10T; Y10T428/00; Y10T428/4935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR THE PRODUCTION OF A CUPRIC AMMONIUM ARSENITE WOOD IMPREGNATING SOLUTION SUBSTANTIALLY FREE OF ARESNATES WHIC COMPRISES CONTACTING WITH A FREE OXYGEN CONTACTING GAS AT A TEMPERATURE OF ABOUT 10* C. TO ABOUT 40* C., AN AQUEOUS AMMONICAL ARSENIOUS OXIDE SOLUTION HAVING METALLIC COPPER IN CONTACT THEREWITH, SAID AQUEOUS AMMONICAL ARESNIOUS OXIDE SOLUTION CONTAINING FROM ABOUT 1 TO ABOUT 3 EQUIVALENTS OF DISSOLVED AMMONIA PER LITER AND FROM ABOUT 0.2K TO ABOUT 0.6 EQUIVALENT OF DISSOLVED ARESNIOUS OXIDE PER EQUIVALENT OF DISSOLVED AMMONIA, SAID METALLIC COPPER BEING PRESENT THROUGHOUT THE
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE PRODUCTION OF A CUPRIC AMMONIUM ARSENITE WOOD IMPREGNATING SOLUTION SUBSTANTIALLY FREE OF ARESNATES WHIC COMPRISES CONTACTING WITH A FREE OXYGEN CONTACTING GAS AT A TEMPERATURE OF ABOUT 10* C. TO ABOUT 40* C., AN AQUEOUS AMMONICAL ARSENIOUS OXIDE SOLUTION HAVING METALLIC COPPER IN CONTACT THEREWITH, SAID AQUEOUS AMMONICAL ARESNIOUS OXIDE SOLUTION CONTAINING FROM ABOUT 1 TO ABOUT 3 EQUIVALENTS OF DISSOLVED AMMONIA PER LITER AND FROM ABOUT 0.2K TO ABOUT 0.6 EQUIVALENT OF DISSOLVED ARESNIOUS OXIDE PER EQUIVALENT OF DISSOLVED AMMONIA, SAID METALLIC COPPER BEING PRESENT THROUGHOUT THE
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) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |