US2887010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutral density filters
Assignee: Individual
•
Filing: 1957-09-09
•
Granted: 1959-05-19
•
Expires: 1977-09-09
Abstract
No abstract record available.
Inventors
- 👤 Ruettiger Justin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:05
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB245336A
Cited
US1090785A
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US2109737A
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US2199715A
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DE745509C
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US2285262A
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US2345777A
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US2392978A
Cited
US2399860A
Cited
US2519545A
Cited
US2543793A
Cited
US2600962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |