US2089351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light diffusing material
Assignee: Individual
•
Filing: 1935-04-23
•
Granted: 1937-08-10
•
Expires: 1955-04-23
Abstract
No abstract record available.
Inventors
- 👤 English Willard Wilbur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:01
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/02; G01J1/04; G01J1/0407; G01J1/0474; Y; Y10; Y10S; Y10S160/00; Y10S160/07; Y10S362/00; Y10S362/812; Y10S428/00; Y10S428/918; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31986; Y10T442/00; Y10T442/30; Y10T442/3854
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) | 1940-08-09 | 1941-02-08 | 1941-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-09 | 1945-02-08 | 1945-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-09 | 1949-02-08 | 1949-08-10 | $7700.00 | Window Closed / Lapsed |