Patent US2829623A successfully refreshed from Google Patents.
US2829623A
Expired / Lapsed
US
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Ink cartridge assembly for ball-point pens
Assignee: MICROPOINT Inc
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Filing: 1954-06-04
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Granted: 1958-04-08
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Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Victor H Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:27
CPC Classifications
B; B43; B43K; B43K7/00; B43K24/00; B43K24/02; B43K24/08
Claims Analysis
Total Claims: 0
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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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |