US1999159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of absorbing carbon monoxide and/or diolefines from gases or vapors
Assignee: Shell Development Co
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Filing: 1930-11-01
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Granted: 1935-04-23
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Expires: 1950-11-01
Abstract
No abstract record available.
Inventors
- 👤 Adrianus Johannes Van Peski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:59
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; C; C07; C07C; C07C7/00; C07C7/11
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) | 1938-04-22 | 1938-10-22 | 1939-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-22 | 1942-10-22 | 1943-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-22 | 1946-10-22 | 1947-04-23 | $7700.00 | Window Closed / Lapsed |