US2651237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced focus lens system
Assignee: BALANSCOPE Inc
•
Filing: 1946-08-01
•
Granted: 1953-09-08
•
Expires: 1966-08-01
Abstract
No abstract record available.
Inventors
- 👤 Stephen E Garutso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:23
CPC Classifications
G; G02; G02B; G02B15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US318666A
Cited
DE373755C
Cited
FR623100A
Cited
GB190327572A
Cited
US1154232A
Cited
US1169731A
Cited
US1446634A
Cited
GB193969A
Cited
US1627892A
Cited
US1954755A
Cited
US1979159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |