Patent US4516535A successfully refreshed from Google Patents.
Patent US1863443A successfully refreshed from Google Patents.
US1863443A
Expired / Lapsed
US
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Method of regulating combustion
Assignee: ARTHUR H BALLARD Inc
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Filing: 1929-12-06
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Granted: 1932-06-14
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Expires: 1949-12-06
Abstract
No abstract record available.
Inventors
- 👤 George E Goodridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:44
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/04; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003
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) | 1935-06-14 | 1935-12-14 | 1936-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-06-14 | 1939-12-14 | 1940-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-06-14 | 1943-12-14 | 1944-06-14 | $7700.00 | Window Closed / Lapsed |