Patent US2590943A successfully refreshed from Google Patents.
US2590943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fountain pen
Assignee: Individual
•
Filing: 1947-05-06
•
Granted: 1952-04-01
•
Expires: 1967-05-06
Abstract
No abstract record available.
Inventors
- 👤 Alexander N Coskey
- 👤 Otto E Erikainen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:11
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/02; B43K5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB109863A
Cited
US1775068A
Cited
US1812229A
Cited
US1923634A
Cited
US1949201A
Cited
DE616460C
Cited
US2291859A
Cited
US2304229A
Cited
US2416112A
Cited
US2454086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |