US3501238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for enhancing differences between similar spatial signals
Assignee: GCA Corp
•
Filing: 1966-09-06
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Granted: 1970-03-17
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Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Karl A Stetson
- 👤 Herbert A Elion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:18
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G02; G02B; G02B27/00; G02B27/42; G02B27/46; G06; G06E; G06E3/00; G06E3/001; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US240374A
Cited
US3227034A
Cited
US3200701A
Cited
US3305834A
Cited
US3437824A
Cited
US3355579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |