Patent US3944752A successfully refreshed from Google Patents.
Patent US2964012A successfully refreshed from Google Patents.
US2964012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instrument
Assignee: David Kahn Inc
•
Filing: 1956-04-05
•
Granted: 1960-12-13
•
Expires: 1976-04-05
Abstract
No abstract record available.
Inventors
- 👤 Julius M Kahn
- 👤 Levy Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:23
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18; B43K5/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1724106A
Cited
US1724107A
Cited
US1762554A
Cited
US1783681A
Cited
GB708633A
Cited
FR1071648A
Cited
US2748749A
Cited
GB728188A
Cited
US2736292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |