Patent US1657371A successfully refreshed from Google Patents.
US1657371A
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Method of making producer gas
Assignee: Individual
•
Filing: 1927-04-28
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Granted: 1928-01-24
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Expires: 1947-04-28
Abstract
No abstract record available.
Inventors
- 👤 Walter M Cross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:59
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/485; C10J3/487; C10J2200/00; C10J2200/15; C10J2200/158; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0936; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129; Y10; Y10S; Y10S48/00; Y10S48/02; Y10S48/04
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) | 1931-01-23 | 1931-07-25 | 1932-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-23 | 1935-07-25 | 1936-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-23 | 1939-07-25 | 1940-01-24 | $7700.00 | Window Closed / Lapsed |