US2305562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectacle hinge
Assignee: Columbia Protektosite Co Inc
•
Filing: 1940-04-30
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Granted: 1942-12-15
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Expires: 1960-04-30
Abstract
No abstract record available.
Inventors
- 👤 Henry C Thompson
- 👤 Stefano Angelo De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:22
CPC Classifications
G; G02; G02C; G02C5/00; G02C5/22; G02C5/2209; G02C2200/00; G02C2200/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984; Y10T29/49863; Y10T29/49876; Y10T29/49908; Y10T29/49915; Y10T29/49925; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32861; Y10T403/32918; Y10T403/32934
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) | 1945-12-14 | 1946-06-15 | 1946-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-14 | 1950-06-15 | 1950-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-14 | 1954-06-15 | 1954-12-15 | $7700.00 | Window Closed / Lapsed |