US2556779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: KAY Inc
•
Filing: 1948-12-27
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Granted: 1951-06-12
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Expires: 1968-12-27
Abstract
No abstract record available.
Inventors
- 👤 Ross Harry Lon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:09
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G09; G09F; G09F13/00; G09F13/26; G09F13/18; G09F2013/184; G09F2013/185; G09F2013/1872; G09F2013/1877; Y; Y10; Y10S; Y10S362/00; Y10S362/806
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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |