Patent US2913882A successfully refreshed from Google Patents.
US2913882A
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Method and apparatus for fraction-ating gaseous mixtures
Assignee: Air Products Inc
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Filing: 1954-05-06
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Granted: 1959-11-24
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Expires: 1974-05-06
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:42
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/044; F25J3/04406; F25J3/04412; F25J3/04763; F25J3/04769; F25J3/04793; F25J3/04866; F25J3/04872; F25J3/04878; F25J3/04884; F25J2200/00; F25J2200/50; F25J2200/54; F25J2235/00; F25J2235/06; F25J2250/00; F25J2250/10; F25J2250/20; Y; Y10; Y10S; Y10S336/00; Y10S336/01; Y10S505/00; Y10S505/825; Y10S505/888; Y10S505/899
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1071878A
Cited
US1537264A
Cited
US1798946A
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US2142446A
Cited
DE849850C
Cited
US2650482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |