Patent US2853972A successfully refreshed from Google Patents.
US2853972A
Expired / Lapsed
US
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Writing instrument and ink therefor
Assignee: Scripto Inc
•
Filing: 1957-11-08
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Granted: 1958-09-30
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Expires: 1977-11-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Eugene P Cofield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:38
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/01; C; C09; C09D; C09D11/00; C09D11/16; C09D11/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US979843A
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US2107424A
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US2220621A
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US2350846A
Cited
GB633879A
Cited
AT162454B
Cited
US2474865A
Cited
US2663649A
Cited
US2715388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |