US2428357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing reflection of a transparent body
Assignee: Individual
•
Filing: 1942-10-15
•
Granted: 1947-10-07
•
Expires: 1962-10-15
Abstract
No abstract record available.
Inventors
- 👤 Morris U Cohen
- 👤 Steigman Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:55
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1581766A
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US2034987A
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US2005900A
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US2230369A
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US2207656A
Cited
GB524427A
Cited
US2281474A
Cited
US2366516A
Cited
US2356553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |