US2671380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic optical objective lens system
Assignee: Applied Biosystems Inc
•
Filing: 1952-06-14
•
Granted: 1954-03-09
•
Expires: 1972-06-14
Abstract
No abstract record available.
Inventors
- 👤 James G Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:51
CPC Classifications
G; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US435271A
Cited
US871559A
Cited
GB168923A
Cited
US2348667A
Cited
US2516724A
Cited
US2494025A
Cited
US2532751A
Cited
US2628532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |