Patent US2389428A successfully refreshed from Google Patents.
US2389428A
Expired / Lapsed
US
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Combined spectacle and telescope
Assignee: Individual
•
Filing: 1945-05-23
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Granted: 1945-11-20
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Expires: 1965-05-23
Abstract
No abstract record available.
Inventors
- 👤 Charles J Glasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:49
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/002; G02B25/00; G02B25/002; G02B25/004; G02C; G02C7/00; G02C7/02; G02C7/08; G02C7/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-11-19 | 1949-05-21 | 1949-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-11-19 | 1953-05-21 | 1953-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-11-19 | 1957-05-21 | 1957-11-20 | $7700.00 | Window Closed / Lapsed |