US3434339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holographic method and apparatus for acoustical field recording
Assignee: GCA Corp
•
Filing: 1966-09-22
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Granted: 1969-03-25
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Expires: 1986-09-22
Abstract
No abstract record available.
Inventors
- 👤 Karl A Stetson
- 👤 Herbert A Elion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:59
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/06; G01N29/0654; G01N29/0663; G03; G03H; G03H3/00; G03H5/00; Y; Y10; Y10S; Y10S359/00; Y10S359/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |