US2540780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet spectrophotometer
Assignee: Wyeth Holdings LLC
•
Filing: 1949-02-26
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Granted: 1951-02-06
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Expires: 1969-02-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Gabel
- 👤 George L Buc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:29
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/34; G01J1/36; G01J1/02; G01J1/04; G01J1/0407; G01J1/0414; G01J1/0429; G01J1/0437; G01J1/0462; G01J1/0477; G01J3/00; G01J3/12; G01J3/14; G01J3/28; G01J3/42; G01J2001/0481
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |