US3480372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing or drawing instrument
Assignee: Corning Glass Works
•
Filing: 1967-11-24
•
Granted: 1969-11-25
•
Expires: 1987-11-24
Abstract
No abstract record available.
Inventors
- 👤 Neal S Kenny
- 👤 Douglas A Warden
- 👤 Alan Louis Sapakie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
B; B43; B43K; B43K1/00; B43K1/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732824A
Cited
GB425413A
Cited
US2585016A
Cited
US2608953A
Cited
US3140505A
Cited
US3203025A
Cited
FR1418087A
Cited
US3361516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |