US2690093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for ascertaining the absorption spectrum of translucent fluid substances
Assignee: Unicam Instruments Ltd
•
Filing: 1952-03-31
•
Granted: 1954-09-28
•
Expires: 1972-03-31
Abstract
No abstract record available.
Inventors
- 👤 Daly Edgar Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1746525A
Cited
US2063140A
Cited
US2066934A
Cited
US2444560A
Cited
US2437323A
Cited
US2605671A
Cited
US2613572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |