US2600962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable narrow band optical filter
Assignee: Polaroid Corp
•
Filing: 1948-10-09
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Granted: 1952-06-17
•
Expires: 1968-10-09
Abstract
No abstract record available.
Inventors
- 👤 Bruce H Billings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/23; G02B; G02B27/00; G02B27/28; G02B27/288; G02B5/00; G02B5/30; G02B5/3083; G02F1/0128; G02F1/03; G02F2203/00; G02F2203/05; G02F2203/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2077031A
Cited
US2163530A
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US2174269A
Cited
US2184999A
Cited
US2418964A
Cited
US2493200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |