US2671609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color mixture computer
Assignee: GAF Chemicals Corp
•
Filing: 1950-09-12
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Granted: 1954-03-09
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Expires: 1970-09-12
Abstract
No abstract record available.
Inventors
- 👤 Hugh R Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:08
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/463; G01J3/465; G06; G06G; G06G3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1621394A
Cited
US2340350A
Cited
US2540797A
Cited
US2442098A
Cited
US2540798A
Cited
US2579220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |