US3524257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constructing ellipses
Assignee: Standardgraph Filler und Fiebig GmbH
•
Filing: 1968-04-30
•
Granted: 1970-08-18
•
Expires: 1988-04-30
Abstract
No abstract record available.
Inventors
- 👤 Jan Jakubowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:55
CPC Classifications
B; B43; B43L; B43L11/00; B43L11/02; B43L11/04; B43L11/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2703454A
Cited
US2933818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |