US2984146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic recording spectrophotometer
Assignee: Individual
•
Filing: 1953-04-13
•
Granted: 1961-05-16
•
Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Kwart Harold
- 👤 Yang Chia-Chih
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:12
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2522976A
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US2613572A
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US2709943A
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US2684443A
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US2721262A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |