Patent US3486825A successfully refreshed from Google Patents.
US3486825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical test equipment and methods for making and using same
Assignee: Individual
•
Filing: 1965-05-10
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Granted: 1969-12-30
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Bradford Howland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:58
CPC Classifications
G; G01; G01M; G01M11/00; G01M11/02; G01M11/0242; G01M11/0257; G01M11/0264; G01M11/0221; G01M11/0285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |