US2742812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
evans
Assignee: —
•
Filing: —
•
Granted: 1956-04-24
•
Expires: 1973-04-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:44
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0149; F; F41; F41G; F41G1/00; F41G1/30; G02B27/0189
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1546687A
Cited
US849504A
Cited
US1067859A
Cited
US1257128A
Cited
US2183530A
Cited
US2464195A
Cited
US2664781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |