Patent US1900655A successfully refreshed from Google Patents.
US1900655A
Expired / Lapsed
US
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Separation of acetylene
Assignee: Airco Inc
•
Filing: 1932-02-11
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Granted: 1933-03-07
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Expires: 1952-02-11
Abstract
No abstract record available.
Inventors
- 👤 Floyd J Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:08
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493; B01D53/1418; B01D53/1487; C; C07; C07C; C07C7/00; C07C7/11; Y; Y02; Y02P; Y02P20/00; Y02P20/10
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) | 1936-03-06 | 1936-09-05 | 1937-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-03-06 | 1940-09-05 | 1941-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-03-06 | 1944-09-05 | 1945-03-07 | $7700.00 | Window Closed / Lapsed |