Patent US1817908A successfully refreshed from Google Patents.
US1817908A
Expired / Lapsed
US
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Process of and means for separating and utilizing constituents of natural gas
Assignee: Individual
•
Filing: 1929-05-21
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Granted: 1931-08-11
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Expires: 1949-05-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Belt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:26
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/50; C01B32/55; Y; Y10; Y10S; Y10S62/00; Y10S62/928; Y10S62/929
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) | 1934-08-10 | 1935-02-09 | 1935-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-10 | 1939-02-09 | 1939-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-10 | 1943-02-09 | 1943-08-11 | $7700.00 | Window Closed / Lapsed |