Patent US2489463A successfully refreshed from Google Patents.
US2489463A
Expired / Lapsed
US
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Stable blue writing ink and a dye therefor
Assignee: Parker Pen Co
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Filing: 1946-02-25
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Granted: 1949-11-29
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Expires: 1966-02-25
Abstract
No abstract record available.
Inventors
- 👤 William B Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:55
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/205; C09B35/215; C09B35/08; C09B35/10; C09B35/16; C09B67/00; C09B67/0071; C09B67/0072; C09B67/0073
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |