US2483244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wernicke prism spectrometers and improved liquids therefor
Assignee: Wyeth Holdings LLC
•
Filing: 1945-03-21
•
Granted: 1949-09-27
•
Expires: 1965-03-21
Abstract
No abstract record available.
Inventors
- 👤 Stamm Robert Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:20
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/12; G01J3/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1952-09-26 | 1953-03-28 | 1953-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-26 | 1957-03-28 | 1957-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-26 | 1961-03-28 | 1961-09-27 | $7700.00 | Window Closed / Lapsed |