Patent US2449978A successfully refreshed from Google Patents.
Patent US1081950A successfully refreshed from Google Patents.
US1081950A
Expired / Lapsed
US
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Process for removing carbon deposited in internal-combustion engines.
Assignee: NORFOLK Manufacturing Co
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Filing: 1913-01-27
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Granted: 1913-12-23
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Expires: 1933-01-27
Abstract
No abstract record available.
Inventors
- 👤 Harley M Eller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:49
CPC Classifications
C; C11; C11D; C11D2111/00; C11D2111/10; C11D2111/14; C11D2111/22
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) | 1916-12-22 | 1917-06-23 | 1917-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-12-22 | 1921-06-23 | 1921-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-12-22 | 1925-06-23 | 1925-12-23 | $7700.00 | Window Closed / Lapsed |