US2937390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loose toner pick-up device
Assignee: International Business Machines Corp
•
Filing: 1957-12-27
•
Granted: 1960-05-24
•
Expires: 1977-12-27
Abstract
No abstract record available.
Inventors
- 👤 Wallis D Bolton
- 👤 Derk J Oldenboom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:33
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1306646A
Cited
US954379A
Cited
US1273928A
Cited
US1669394A
Cited
US2576047A
Cited
US2791788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |