US3249009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three component telescope objective
Assignee: Farrand Optical Co Inc
•
Filing: 1963-02-21
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Granted: 1966-05-03
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Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Lescher Edmund Jakob
- 👤 Tronnier Albrecht Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:09
CPC Classifications
G; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A TELESCOPIC OBJECTIVE LENS COMPRISING, BEGINNING AT THE LONG CONJUGATE SIDE THEREOF, FRONT, MIDDLE AND REAR COMPONENTS L1, L2, AND L3, SAID LENS CONFORMING SUBSTANTIALLY TO THE FOLLOWING SPECIFICATION, WHEREIN F IS THE EQUIVALENT FOCAL LENGTH OF THE LENS:
Claim 2
Dependent Claim
39 words
A TELESCOPIC OBJECTIVE LENS COMPRISING, BEGINNING AT THE LONG CONJUGATE SIDE THEREOF, FRONT, MIDDLE AND REAR COMPONENTS L1, L2, AND L3, SAID LENS CONFORMING SUBSTANTIALLY TO THE FOLLOWING SPECIFICATION, WHEREIN F IS THE EQUIVALENT FOCAL LENGTH OF THE LENS:
References Cited (Backward Citations)
GB560611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |