US2582306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Working fluid for use in refrigerating systems and method of preventing corrosion in refrigerating systems
Assignee: ZELLHOEFER
•
Filing: 1948-01-10
•
Granted: 1952-01-15
•
Expires: 1968-01-10
Abstract
No abstract record available.
Inventors
- 👤 Glenn F Zellhoefer
- 👤 Samuel E Vickers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:37
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A STABILIZED WORKING FLUID FOR USE IN A REFRIGERATION SYSTEM OF THE ABSORPTION TYPE CONSISTING OF A MIXTURE OF THE FOLLOWING INGREDIENTS: 40% TO 90% OF A GLYCOL ETHER, 1% TO 5% OF COPPER AND 10% TO 60% OF A HIGHLY VOLATILE ALIPHATIC HALIDE CONTAINING AT LEAST ONE HYDROGEN ATOM.
Claim 2
Dependent Claim
50 words
A STABILIZED WORKING FLUID FOR USE IN A REFRIGERATION SYSTEM OF THE ABSORPTION TYPE CONSISTING OF A MIXTURE OF THE FOLLOWING INGREDIENTS: 40% TO 90% OF A GLYCOL ETHER, 1% TO 5% OF COPPER AND 10% TO 60% OF A HIGHLY VOLATILE ALIPHATIC HALIDE CONTAINING AT LEAST ONE HYDROGEN ATOM.
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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |