US2927554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cascade developing apparatus
Assignee: International Business Machines Corp
•
Filing: 1957-09-23
•
Granted: 1960-03-08
•
Expires: 1977-09-23
Abstract
No abstract record available.
Inventors
- 👤 Derk J Oldenboom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:19
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0801
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US29256A
Cited
US114753A
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US1296926A
Cited
US2173032A
Cited
US2701774A
Cited
US2576047A
Cited
US2820716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |