Patent US4090010A successfully refreshed from Google Patents.
Patent US2600207A successfully refreshed from Google Patents.
US2600207A
Expired / Lapsed
US
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Four component optical objectives having four internal contact surfaces
Assignee: Taylor Taylor and Hobson Ltd
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Filing: 1950-04-03
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Granted: 1952-06-10
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Expires: 1970-04-03
Abstract
No abstract record available.
Inventors
- 👤 Cook Gordon Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:46
CPC Classifications
G; G02; G02B; G02B9/00; G02B9/34
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |