US3514612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Astronomical seeing conditions monitor
Assignee: ALBERT L DE GRAFFENRIED
•
Filing: 1967-08-23
•
Granted: 1970-05-26
•
Expires: 1987-08-23
Abstract
No abstract record available.
Inventors
- 👤 Albert L De Graffenried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:32
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53; G01N21/538
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2751921A
Cited
US3135957A
Cited
US3393307A
Cited
US3198513A
Cited
US3354299A
Cited
US3452872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |