US2930283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical comparators and the like
Assignee: Optical Measuring Tools Ltd
•
Filing: 1954-12-02
•
Granted: 1960-03-29
•
Expires: 1974-12-02
Abstract
No abstract record available.
Inventors
- 👤 Smith Harry John
- 👤 Dietrich Cornelius Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:32
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1727875A
Cited
US2238782A
Cited
US2476312A
Cited
US2580239A
Cited
US2629936A
Cited
US2542755A
Cited
US2703456A
Cited
US2621556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |