Patent US3300764A successfully refreshed from Google Patents.
US2198014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system
Assignee: Individual
•
Filing: 1937-07-22
•
Granted: 1940-04-23
•
Expires: 1957-07-22
Abstract
No abstract record available.
Inventors
- 👤 Harry G Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:16
CPC Classifications
G; G02; G02B; G02B19/00; G02B19/0033; G02B19/0047; F; F21; F21S; F21S41/00; F21S41/10; F21S41/14; F21S41/162; F21S41/30; F21S41/32; F21S41/321; F21S41/36; F21S41/365; G02B19/0004; G02B19/0028
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1943-04-23 | 1943-10-23 | 1944-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-23 | 1947-10-23 | 1948-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-23 | 1951-10-23 | 1952-04-23 | $7700.00 | Window Closed / Lapsed |