US2487890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: COXHEAD RALPH C CORP
•
Filing: 1946-06-26
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Granted: 1949-11-15
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Expires: 1966-06-26
Abstract
No abstract record available.
Inventors
- 👤 Charles W Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:27
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/60; B41J19/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2133973A
Cited
US2263642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |