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Patent US2524972A successfully refreshed from Google Patents.
US2524972A
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Magnetic eyecup
Assignee: Individual
•
Filing: 1949-05-03
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Granted: 1950-10-10
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Expires: 1969-05-03
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:56
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/50; A61B17/52; A61H; A61H35/00; A61H35/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US655413A
Cited
US1557620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |