US3515461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catadioptric objective of the cassegrain type
Assignee: Applied Biosystems Inc
•
Filing: 1967-01-30
•
Granted: 1970-06-02
•
Expires: 1987-01-30
Abstract
No abstract record available.
Inventors
- 👤 Raul E Casas
- 👤 Juan L Rayces
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:45
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/08; G02B17/0884; G02B17/0804; G02B17/0808; G02B17/0852
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2726574A
Cited
US3119892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |