Patent US3439650A successfully refreshed from Google Patents.
US3439650A
Expired / Lapsed
US
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Information transfer and ink particle refining system
Assignee: Borg Warner Corp
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Filing: 1965-07-12
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Granted: 1969-04-22
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Expires: 1985-07-12
Abstract
No abstract record available.
Inventors
- 👤 Philip A Stowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:48
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/082; G03G15/0822; G03G15/0887
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US797080A
Cited
US2540348A
Cited
US2583456A
Cited
US2779468A
Cited
GB837801A
Cited
US3122453A
Cited
US3316876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |