US3431044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diminutive mechanical method of changing color and color saturation
Assignee: Individual
•
Filing: 1965-01-04
•
Granted: 1969-03-04
•
Expires: 1985-01-04
Abstract
No abstract record available.
Inventors
- 👤 William T Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:41
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1885642A
Cited
US2263684A
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US2380481A
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US2298058A
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US2383186A
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US2473857A
Cited
US2527593A
Cited
US2651971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |