Patent US2437288A successfully refreshed from Google Patents.
US2437288A
Expired / Lapsed
US
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Separation of gaseous mixtures
Assignee: Individual
•
Filing: 1943-12-28
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Granted: 1948-03-09
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Expires: 1963-12-28
Abstract
No abstract record available.
Inventors
- 👤 Ray B Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:04
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US989927A
Cited
US1351151A
Cited
GB311693A
Cited
US1882289A
Cited
GB417379A
Cited
GB441104A
Cited
GB422636A
Cited
US2161663A
Cited
US2177068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |