Patent US2531945A successfully refreshed from Google Patents.
US2531945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflection reducing coatings having uniform reflection for all wave lengths of lightand method of forming such coatings
Assignee: American Optical Corp
•
Filing: 1947-04-05
•
Granted: 1950-11-28
•
Expires: 1967-04-05
Abstract
No abstract record available.
Inventors
- 👤 Harold R Moulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:34
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/26; Y10T428/261
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2281474A
Cited
GB537591A
Cited
US2366516A
Cited
US2376428A
Cited
US2331716A
Cited
US2366687A
Cited
US2432484A
Cited
US2420168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |