US2474061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing thin microporous silica coatings having reflection reducing characteristics and the articles so coated
Assignee: American Optical Corp
•
Filing: 1943-07-23
•
Granted: 1949-06-21
•
Expires: 1963-07-23
Abstract
No abstract record available.
Inventors
- 👤 Harold R Moulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:55
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1809755A
Cited
US2118898A
Cited
US2329632A
Cited
GB538273A
Cited
US2220862A
Cited
US2366516A
Cited
US2356553A
Cited
US2384209A
Cited
US2347733A
Cited
US2371611A
Cited
US2428357A
Cited
US2432484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |