US1577534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separating or recovering alpha gas from alpha mixture of gases
Assignee: Silica Gel Corp
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Filing: 1922-06-15
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Granted: 1926-03-23
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Expires: 1942-06-15
Abstract
No abstract record available.
Inventors
- 👤 Ernest B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:05
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/08; B01D2253/00; B01D2253/10; B01D2253/106; B01D2257/00; B01D2257/30; B01D2257/302; B01D2257/70; B01D2257/702; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40077; B01D2259/40079; B01D2259/40081; B01D2259/40083; B01D2259/40088; B01D2259/403; B01D53/26; B01D53/261; Y; Y10; Y10S; Y10S261/00; Y10S261/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-03-22 | 1929-09-21 | 1930-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-03-22 | 1933-09-21 | 1934-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-03-22 | 1937-09-21 | 1938-03-23 | $7700.00 | Window Closed / Lapsed |