US3556631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage imaging process in which a hologram is made from a three-dimensional image formed in incoherent light
Assignee: Holobeam Inc
•
Filing: 1969-09-03
•
Granted: 1971-01-19
•
Expires: 1989-09-03
Abstract
Abstract THIS INVENTION IS AN APPARATUS FOR A ND A SYSTEM OF PHOTOGRAPHY. RADIATION FROM AN OBJECT IS IMAGED WITHIN A PLATE OF PHOTOCHROMIC MATERIAL. THE PLATE IS THEN USED TO FORM A HOLOGRAM REPRESENTATIVE OF THE OBJECT IN A SECOND OPERATION INVOLVING EXPOSURE OF A PHOTOGRAPHIC PLATE BY TRANSMISSION OF RADIATION THROUGH OR SCATTERING OF RADIATION FROM THE EXPOSED PLATE OF PHOTOCHROMIC MATERIAL AND INTERFERENCE OF SUCH RADIATION WITH A REFERENCE BEAM. IN CERTAIN CASES, A THIRD STAGE OF OPERATION MAY BE ADVISABLE INVOLVING FORMATION OF A SECOND HOLOGRAM FROM THE FIRST HOLOGRAM IN ORDER TO OBTAIN A HOLOGRAM OF HIGHER TRANSMISSIVITY.
Inventors
- 👤 Melvin Seymour Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:20
CPC Classifications
G; G03; G03H; G03H1/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |