Patent US2581865A successfully refreshed from Google Patents.
US2581865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional cover for protecting the focusing mechanism of binoculars
Assignee: Individual
•
Filing: 1947-03-26
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Granted: 1952-01-08
•
Expires: 1967-03-26
Abstract
No abstract record available.
Inventors
- 👤 Kershaw Norman
- 👤 Ryder Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:40
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/16; G02B23/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1479409A
Cited
GB167483A
Cited
CH116555A
Cited
GB410292A
Cited
US2047909A
Cited
US2285388A
Cited
GB584390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |