US2949887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing implement
Assignee: WA Sheaffer Pen Co
•
Filing: 1956-10-11
•
Granted: 1960-08-23
•
Expires: 1976-10-11
Abstract
No abstract record available.
Inventors
- 👤 Lynn P Martin
- 👤 Elmer D Thompson
- 👤 Roland L Brannon
- 👤 Lee W Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:46
CPC Classifications
B; B43; B43K; B43K5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190821631A
Cited
GB118130A
Cited
US1743786A
Cited
US2291859A
Cited
US2413234A
Cited
US2769427A
Cited
US2799247A
Cited
US2784699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |