US2458973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared spectrophotometry
Assignee: Wyeth Holdings LLC
•
Filing: 1943-09-25
•
Granted: 1949-01-11
•
Expires: 1963-09-25
Abstract
No abstract record available.
Inventors
- 👤 Robert B Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:49
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2123573A
Cited
US1894132A
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US2065953A
Cited
US2314800A
Cited
US2269674A
Cited
US2328293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |