Patent US2991694A successfully refreshed from Google Patents.
US2991694A
Expired / Lapsed
US
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Brow trim and nose pad construction for spectacles or the like
Assignee: CHICAGO EYE SHIELD CO
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Filing: 1956-11-28
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Granted: 1961-07-11
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Expires: 1976-11-28
Abstract
No abstract record available.
Inventors
- 👤 Willis Z Whipple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:57
CPC Classifications
G; G02; G02C; G02C5/00; G02C5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1335318A
Cited
US1278431A
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US1600605A
Cited
GB369904A
Cited
US2463041A
Cited
US2627783A
Cited
GB704696A
Cited
US2756631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |