US2547545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for measuring the optical properties of films
Assignee: Libbey Owens Ford Glass Co
•
Filing: 1947-12-24
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Granted: 1951-04-03
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Expires: 1967-12-24
Abstract
No abstract record available.
Inventors
- 👤 Strong John Donovan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/8422
Claims Analysis
Total Claims: 0
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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) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |