Patent US1774218A successfully refreshed from Google Patents.
US1774218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge-forming device
Assignee: Individual
•
Filing: 1928-01-30
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Granted: 1930-08-26
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Expires: 1948-01-30
Abstract
No abstract record available.
Inventors
- 👤 Zambelli Raffaele
- 👤 Sarchi Pietro
- 👤 Magri Luigi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:15
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4361; F02M2700/4369
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) | 1933-08-25 | 1934-02-24 | 1934-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-08-25 | 1938-02-24 | 1938-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-08-25 | 1942-02-24 | 1942-08-26 | $7700.00 | Window Closed / Lapsed |