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US2475471A
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Glare-eliminating eyeshield
Assignee: Polaroid Corp
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Filing: 1946-12-06
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Granted: 1949-07-05
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Expires: 1966-12-06
Abstract
No abstract record available.
Inventors
- 👤 Clarance O Brown
- 👤 Murry N Fairbank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:00
CPC Classifications
A; A42; A42B; A42B1/00; A42B1/24; A42B1/247; A61; A61F; A61F9/00; A61F9/02; A61F9/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1313469A
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US1199650A
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US1543094A
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US1671342A
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US1716719A
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US1871461A
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US2013636A
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US2337617A
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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) | 1952-07-04 | 1953-01-03 | 1953-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-04 | 1957-01-03 | 1957-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-04 | 1961-01-03 | 1961-07-05 | $7700.00 | Window Closed / Lapsed |