US3437820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical distance measuring equipment utilizing two wavelengths of light in order to determine and compensate for the density of the air
Assignee: COMMERCE USA
•
Filing: 1967-05-09
•
Granted: 1969-04-08
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Expires: 1987-05-09
Abstract
No abstract record available.
Inventors
- 👤 Moody C Thompson Jr
- 👤 Lockett E Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:55
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/02; G01S17/06; G01S17/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2966090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |