US1845835A
Expired / Lapsed
US
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Measuring the intensity of ultraviolet rays
Assignee: IG Farbenindustrie AG
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Filing: 1928-06-05
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Granted: 1932-02-16
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Expires: 1948-06-05
Abstract
No abstract record available.
Inventors
- 👤 Frankenburger Walter
- 👤 Robl Rudolf
- 👤 Zimmermann Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
A; A61; A61N; A61N5/00; Y; Y10; Y10S; Y10S436/00; Y10S436/905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-02-15 | 1935-08-17 | 1936-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-02-15 | 1939-08-17 | 1940-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-02-15 | 1943-08-17 | 1944-02-16 | $7700.00 | Window Closed / Lapsed |