Patent US3371350A successfully refreshed from Google Patents.
US3371350A
Expired / Lapsed
US
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Ink supply system with pressure regulating diaphragm
Assignee: HP Inc
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Filing: 1966-09-09
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Granted: 1968-02-27
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Expires: 1986-09-09
Abstract
No abstract record available.
Inventors
- 👤 Robert A Sanderson
- 👤 Robert G Graves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:58
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175; G; G01; G01D; G01D15/00; G01D15/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |