Patent US2947539A successfully refreshed from Google Patents.
US2947539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for separating original and copy sheets
Assignee: Chemische Fabriek L Van der Grinten NV
•
Filing: 1958-02-04
•
Granted: 1960-08-02
•
Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Breuers Theo Pierre Chretien
- 👤 Meyer Henricus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:54
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |