Patent US2461987A successfully refreshed from Google Patents.
Patent US940885A successfully refreshed from Google Patents.
US940885A
Expired / Lapsed
US
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Apparatus for separating the constituent elements of gaseous mixtures.
Assignee: Individual
•
Filing: 1906-04-18
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Granted: 1909-11-23
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Expires: 1926-04-18
Abstract
No abstract record available.
Inventors
- 👤 Edoardo Mazza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:55
CPC Classifications
B; B04; B04B; B04B7/00; B04B7/02; Y; Y10; Y10S; Y10S494/00; Y10S494/90; Y10T; Y10T29/00; Y10T29/51; Y10T29/5116
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) | 1912-11-22 | 1913-05-24 | 1913-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-11-22 | 1917-05-24 | 1917-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-11-22 | 1921-05-24 | 1921-11-23 | $7700.00 | Window Closed / Lapsed |