US3520660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light detection instrument
Assignee: National Aeronautics and Space Administration
•
Filing: 1966-09-09
•
Granted: 1970-07-14
•
Expires: 1986-09-09
Abstract
No abstract record available.
Inventors
- 👤 Emmett W Chappelle
- 👤 Duane G Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:10
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/76; G01N21/17; G01N21/25; G01N21/251; G01N21/253; Y; Y10; Y10S; Y10S435/00; Y10S435/808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3344702A
Cited
US3319512A
Cited
US3271112A
Cited
US3327535A
Cited
US3287089A
Cited
US3359973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |