US2561893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethyl cellulose stabilized with an organic copper salt
Assignee: Hercules Powder Co
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Filing: 1948-05-07
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Granted: 1951-07-24
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Expires: 1968-05-07
Abstract
No abstract record available.
Inventors
- 👤 Peter Van Wyck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AS A NEW COMPOSITION OF MATTER, AN ETHYL CELLULOSE CHARACTERIZED BY THE PRESENCE THEREIN OF AN AGENT CAPABLE OF STABILIZING THE ETHER AGAINST THE DEGRADING EFFECTS OF HEAT AND OXYGEN WITHOUT REDUCING THE VISCOSITY OF THE ETHER, SAID AGENT BEING AN ORGANIC SALT OF COPPER OF THE GROUP CONSISTING OF COPPER ACETATE, COPPER CITRATE, COPPER BENOZYL BENZOATE, COPPER NAPHTHENATE, AND COPPER OXALATE IN A SUFFICIENT AMOUNT TO STABILIZE THE ETHER WITHIN THE RANGE FROM ABOUT 0.0002% TO ABOUT 1% OF COPPER BASED ON THE WEIGHT OF THE ETHER.
Claim 2
Dependent Claim
88 words
AS A NEW COMPOSITION OF MATTER, AN ETHYL CELLULOSE CHARACTERIZED BY THE PRESENCE THEREIN OF AN AGENT CAPABLE OF STABILIZING THE ETHER AGAINST THE DEGRADING EFFECTS OF HEAT AND OXYGEN WITHOUT REDUCING THE VISCOSITY OF THE ETHER, SAID AGENT BEING AN ORGANIC SALT OF COPPER OF THE GROUP CONSISTING OF COPPER ACETATE, COPPER CITRATE, COPPER BENOZYL BENZOATE, COPPER NAPHTHENATE, AND COPPER OXALATE IN A SUFFICIENT AMOUNT TO STABILIZE THE ETHER WITHIN THE RANGE FROM ABOUT 0.0002% TO ABOUT 1% OF COPPER BASED ON THE WEIGHT OF THE ETHER.
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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |