Patent US2254975A successfully refreshed from Google Patents.
US2254975A
Expired / Lapsed
US
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Material for pen tips
Assignee: Parker Pen Co
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Filing: 1940-09-09
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Granted: 1941-09-02
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Expires: 1960-09-09
Abstract
No abstract record available.
Inventors
- 👤 Milton R Pickus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:44
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; B; B43; B43K; B43K1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-09-01 | 1945-03-03 | 1945-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-01 | 1949-03-03 | 1949-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-01 | 1953-03-03 | 1953-09-02 | $7700.00 | Window Closed / Lapsed |