Patent US3551027A successfully refreshed from Google Patents.
US3551027A
Expired / Lapsed
US
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Outboard polarizing light-transmitting means
Assignee: Polaroid Corp
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Filing: 1968-01-11
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Granted: 1970-12-29
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Expires: 1988-01-11
Abstract
No abstract record available.
Inventors
- 👤 Arthur D Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:13
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/281; B; B64; B64C; B64C1/00; B64C1/14; B64C1/1476; B64C1/1484
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |