Patent US3434777A successfully refreshed from Google Patents.
US3434777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment for stereomicroscopes
Assignee: Elgeet Optical Co Inc
•
Filing: 1966-10-31
•
Granted: 1969-03-25
•
Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Louis J Santirocco
- 👤 Joachim A Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:59
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/18; G02B21/20; G02B21/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US973438A
Cited
US1521339A
Cited
US2406798A
Cited
US2456521A
Cited
GB637198A
Cited
US2866382A
Cited
GB911827A
Cited
US3030857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |