Patent US3488512A successfully refreshed from Google Patents.
US3488512A
Expired / Lapsed
US
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Shutter for increasing the contrast of moire patterns
Assignee: Rheinmetall Air Defence AG
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Filing: 1967-12-05
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Granted: 1970-01-06
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Expires: 1987-12-05
Abstract
No abstract record available.
Inventors
- 👤 Ulrich La Roche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:05
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; G01D5/38; G02; G02B; G02B5/00; G02B5/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2380666A
Cited
US2886718A
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US3070700A
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US3153111A
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US3216318A
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US3232165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |