US2663171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ornamental object having polarizing and birefringent layers
Assignee: Individual
•
Filing: 1950-11-22
•
Granted: 1953-12-22
•
Expires: 1970-11-22
Abstract
No abstract record available.
Inventors
- 👤 Boone Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:29
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; B; B44; B44F; B44F1/00; B44F1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2017705A
Cited
US2096696A
Cited
US2287546A
Cited
DE683933C
Cited
US2158129A
Cited
US2362573A
Cited
US2519547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |