US2207656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of decreasing reflection of light from surfaces, and articles so produced
Assignee: Research Corp
•
Filing: 1938-12-27
•
Granted: 1940-07-09
•
Expires: 1958-12-27
Abstract
No abstract record available.
Inventors
- 👤 Cartwright Charles Hawley
- 👤 Turner Arthur Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:15
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; Y; Y10; Y10S; Y10S126/00; Y10S126/907; Y10S126/908; Y10S425/00; Y10S425/808
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) | 1943-07-09 | 1944-01-08 | 1944-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-09 | 1948-01-08 | 1948-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-09 | 1952-01-08 | 1952-07-09 | $7700.00 | Window Closed / Lapsed |