Patent US2597472A successfully refreshed from Google Patents.
US2597472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for maintaining the viscosity of ink through circulation
Assignee: Graymills Corp
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Filing: 1946-02-15
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Granted: 1952-05-20
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Expires: 1966-02-15
Abstract
No abstract record available.
Inventors
- 👤 Gray John De Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:32
CPC Classifications
B; B41; B41F; B41F31/00; B41F31/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A SYSTEM FOR CIRCULATING AN INK SOLUTION CONTAINING A VOLATILE SOLVENT THROUGH AN INK RESERVOIR OPEN TO THE AIR WHICH COMPRISES A CONTAINER FOR INK SOLUTION, A PUMP ASSOCIATED WITH THE CONTAINER FOR CIRCULATING THE INK SOLUTION, A PUMP ACTUATING MEANS, MEANS FOR FLOWING THE SOLUTION CONTINUOUSLY BETWEEN THE RESERVIOR AND THE CONTAINER, AND A SOLVENT TANK HAVING AN OUTLET LEADING INTO THE CONTAINER WITH A VALVE THEREON FOR CONTINUOUSLY INTRODUCING A SOLVENT FOR THE INK SOLUTION INTO THE CONTAINER.
Claim 2
Independent Claim
80 words
A SYSTEM FOR CIRCULATING AN INK SOLUTION CONTAINING A VOLATILE SOLVENT THROUGH AN INK RESERVOIR OPEN TO THE AIR WHICH COMPRISES A CONTAINER FOR INK SOLUTION, A PUMP ASSOCIATED WITH THE CONTAINER FOR CIRCULATING THE INK SOLUTION, A PUMP ACTUATING MEANS, MEANS FOR FLOWING THE SOLUTION CONTINUOUSLY BETWEEN THE RESERVIOR AND THE CONTAINER, AND A SOLVENT TANK HAVING AN OUTLET LEADING INTO THE CONTAINER WITH A VALVE THEREON FOR CONTINUOUSLY INTRODUCING A SOLVENT FOR THE INK SOLUTION INTO THE CONTAINER.
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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |