US2537011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable
Assignee: —
•
Filing: —
•
Granted: 1951-01-09
•
Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:19
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/24; E; E06; E06B; E06B9/00; E06B9/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2474712A
Cited
US1870284A
Cited
US1780773A
Cited
US1782328A
Cited
AU820632A
Cited
US2220861A
Cited
US2338497A
Cited
US2369741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |