Patent US3760198A successfully refreshed from Google Patents.
Patent US2884832A successfully refreshed from Google Patents.
US2884832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for effecting certain measurements in the fitting of eyeglasses
Assignee: Individual
•
Filing: 1953-04-13
•
Granted: 1959-05-05
•
Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Otto R Engelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:04
CPC Classifications
G; G02; G02C; G02C13/00; G02C13/003; G02C13/005; G02B; G02B27/00; G02B27/02; G02B27/08
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |