US2432484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflection reducing coating having a gradually increasing index of refraction
Assignee: American Optical Corp
•
Filing: 1943-03-12
•
Granted: 1947-12-09
•
Expires: 1963-03-12
Abstract
No abstract record available.
Inventors
- 👤 Harold R Moulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:40
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24364; Y10T428/24372; Y10T428/24421
Claims Analysis
Total Claims: 0
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GB134160A
Cited
US1698302A
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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) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |