US2670189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge forming device
Assignee: Tillotson Manufacturing Co
•
Filing: 1949-12-17
•
Granted: 1954-02-23
•
Expires: 1969-12-17
Abstract
No abstract record available.
Inventors
- 👤 Bernard C Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:46
CPC Classifications
F; F02; F02M; F02M17/00; F02M17/02; F02M17/44; F02M17/48; Y; Y10; Y10S; Y10S261/00; Y10S261/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1538856A
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US1674029A
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US1942199A
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US1990563A
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US1956992A
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US2529242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |