US2438231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for fountain pens and the like
Assignee: Individual
•
Filing: 1946-01-18
•
Granted: 1948-03-23
•
Expires: 1966-01-18
Abstract
No abstract record available.
Inventors
- 👤 Edward S Schultz
- 👤 Charles D Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:11
CPC Classifications
B; B43; B43K; B43K23/00; B43K23/08; B43K23/12; B43K23/126; F; F16; F16B; F16B2200/00; F16B2200/10; Y; Y10; Y10S; Y10S211/00; Y10S211/01; Y10T; Y10T292/00; Y10T292/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US451603A
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US712447A
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US1198227A
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US1861171A
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US2303580A
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US2278907A
Cited
US2385859A
Cited
US2397931A
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US2386500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |