Patent US3015987A successfully refreshed from Google Patents.
US3015987A
Expired / Lapsed
US
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Ventilated frame for lenses
Assignee: Individual
•
Filing: 1959-04-07
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Granted: 1962-01-09
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Expires: 1979-04-07
Abstract
No abstract record available.
Inventors
- 👤 Walter H Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:46
CPC Classifications
G; G02; G02C; G02C11/00; G02C11/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2197682A
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US2344230A
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US2608687A
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US2482195A
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CH263067A
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US2639429A
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FR1038685A
Cited
US2919622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-08 | 1965-07-10 | 1966-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-08 | 1969-07-10 | 1970-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-08 | 1973-07-10 | 1974-01-09 | $7700.00 | Window Closed / Lapsed |