Patent US4895718A successfully refreshed from Google Patents.
Patent US2630218A successfully refreshed from Google Patents.
US2630218A
Expired / Lapsed
US
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Core disk and method of making same
Assignee: Individual
•
Filing: 1950-08-17
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Granted: 1953-03-03
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Expires: 1970-08-17
Abstract
No abstract record available.
Inventors
- 👤 Mcgregor David Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:15
CPC Classifications
A; A01; A01F; A01F15/00; A01F15/08; A01F15/12; B; B65; B65D; B65D85/00; B65D85/02; B65D85/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |