US3613248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting machine pen conditioner
Assignee: Cal Comp Inc
•
Filing: 1969-08-27
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Granted: 1971-10-19
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Expires: 1989-08-27
Abstract
Abstract THE INVENTION CONCERNS APPARATUS FOR LIFTING AND LOWERING A PEN IN AN AUTOMATIC DRAFTING MACHINE, AND WHEREIN THE PEN TIP IS CONDITIONED DURING STORAGE IN RETRACTED POSITION.
Inventors
- 👤 Andrew M Mcinnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:59
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02; B43L13/022; B43L13/024; B43K; B43K15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |