US2398382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating optical elements
Assignee: Individual
•
Filing: 1942-11-17
•
Granted: 1946-04-16
•
Expires: 1962-11-17
Abstract
No abstract record available.
Inventors
- 👤 Dean A Lyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:38
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/54; C23C14/541; C03; C03C; C03C17/00; C03C17/22; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/28; C03C2217/284; C03C2217/285; C03C2217/287; C03C2217/288; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/151
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) | 1949-04-15 | 1949-10-15 | 1950-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-15 | 1953-10-15 | 1954-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-15 | 1957-10-15 | 1958-04-16 | $7700.00 | Window Closed / Lapsed |