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US3515489A
Expired / Lapsed
US
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Optical apparatus
Assignee: Milton Roy LLC
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Filing: 1966-03-03
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Granted: 1970-06-02
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Expires: 1986-03-03
Abstract
No abstract record available.
Inventors
- 👤 James J Chisholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:01
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/08; G01; G01J; G01J3/00; G01J3/02; G01J3/0205; G01J3/0208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1369764A
Cited
US1783481A
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US2453164A
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US2630736A
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US2807799A
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US2976362A
Cited
US3013467A
Cited
US3195405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |