US2900800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for maintaining efficiency of vacuum insulation
Assignee: Union Carbide Corp
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Filing: 1956-01-05
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Granted: 1959-08-25
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Expires: 1976-01-05
Abstract
Abstract 800,204. Storing liquefied gases. UNION CARBIDE CORPORATION. Dec. 12, 1956 [Jan. 5, 1956], No. 38007/56. Class 8(2). [Also in Group XIII] Traces of moisture are absorbed from the vacuum or powder-invacuum insulation 14, between a liquid oxygen container 13 and an outer shell 12 by a molecular sieve 16 of natural or synthetic zeolite having a pore size of at least five angstrom units. Calcium zeolite " A " or sodium zeolite " X " is located within a blister 16 beneath the container 13 and having an aperture covered by a glass wool filter 21 through which the traces of moisture pass to the absorbent. Specifications 777,232 and 777,233, [both in Group III] are referred to.
Inventors
- 👤 Paul E Loveday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F17C3/08; F17C13/00; F17C13/001; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/03; F17C2201/032; F17C2203/00; F17C2203/03; F17C2203/0304; F17C2203/0337; F17C2203/0391; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0629; F17C2205/00; F17C2205/01; F17C2205/0153; F17C2205/018; F17C2221/00; F17C2221/01; F17C2221/011; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2260/00; F17C2260/01; F17C2260/017; F17C2260/03; F17C2260/031; F17C2260/033; F17C2270/00; F17C2270/01; F17C2270/0165; F17C2270/0168; F17C2270/0171; F17C2270/0173; Y; Y10; Y10S; Y10S220/00; Y10S220/901; Y10S62/00; Y10S62/13
Claims Analysis
Total Claims: 0
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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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |