US2749256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of impregnating cellulosic materials with copper in chemically bound relation with the cellulose
Assignee: National Cylinder Gas Co
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Filing: 1954-02-16
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Granted: 1956-06-05
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Expires: 1974-02-16
Abstract
No abstract record available.
Inventors
- 👤 Bottoms Robert Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:49
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/02; B27K3/0278; B27K1/00; B27K3/16; B27K3/22; B27K3/34; B27K3/346; B27K5/00; B27K5/001; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31989; Y10T428/4935; Y10T428/662
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR INCREASING THE IMMUNITY OF CELLULOSIC MATERIALS TO ORGANIC AGENTS OF DECAY BY PROVISION THEREIN OF COPPER INC HEMICALLY BOUND RELATION WITH CELLULOSE MOLECULES OF SAID MATERIALS WHICH COMPRISES INCORPORATING CUPRIC FORMATE IN CELLULOSIC MATERIAL, DECOMPOSING SAID CUPRIC FORMATE AND EFFECTING CHEMICAL COMBINATION BE TWEEN SAID CELLULOSE MOLECULES AND A SUBSTANTIAL PORTION OF THE COPPER THUS INCORPORATED IN SAID MATERIALS BY HEATING THE CELLULOSIC MATERIAL CONTAINING SAID INCORPORATED CUPRIC FORMATE TO A TEMPERATURE ABOVE ABOUT 100* C. BUT BELOW TEMPERATURES THAT ARE CAPABLE OF DELETERIOUSLY AFFECTING THE CELLULOSIC MATERIAL.
Claim 2
Dependent Claim
91 words
A PROCESS FOR INCREASING THE IMMUNITY OF CELLULOSIC MATERIALS TO ORGANIC AGENTS OF DECAY BY PROVISION THEREIN OF COPPER INC HEMICALLY BOUND RELATION WITH CELLULOSE MOLECULES OF SAID MATERIALS WHICH COMPRISES INCORPORATING CUPRIC FORMATE IN CELLULOSIC MATERIAL, DECOMPOSING SAID CUPRIC FORMATE AND EFFECTING CHEMICAL COMBINATION BE TWEEN SAID CELLULOSE MOLECULES AND A SUBSTANTIAL PORTION OF THE COPPER THUS INCORPORATED IN SAID MATERIALS BY HEATING THE CELLULOSIC MATERIAL CONTAINING SAID INCORPORATED CUPRIC FORMATE TO A TEMPERATURE ABOVE ABOUT 100* C. BUT BELOW TEMPERATURES THAT ARE CAPABLE OF DELETERIOUSLY AFFECTING THE CELLULOSIC MATERIAL.
References Cited (Backward Citations)
GB276877A
Cited
US2186713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |