Patent US2888372A successfully refreshed from Google Patents.
US2888372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freely supported retina
Assignee: Individual
•
Filing: 1957-06-04
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Granted: 1959-05-26
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Expires: 1977-06-04
Abstract
No abstract record available.
Inventors
- 👤 Walter A Feibelman
- 👤 Robert C Ohlmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:36
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H01J29/458; H01J29/38; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A RETINA CONSISTING OF AN APERTURES FRAME, A SILICON MONOXIDE FILM COVERING THE APERTURE IN THE FRAME, A METAL BLACK LAYER ON ONE SIDE OF THE SILICON MONOXIDE FILM, AND A PHOTO LAYER ON THE SIDE OF THE SILICON MONOXIDE FILM REMOTE FROM THAT BEARING THE METAL BLACK.
Claim 2
Dependent Claim
48 words
A RETINA CONSISTING OF AN APERTURES FRAME, A SILICON MONOXIDE FILM COVERING THE APERTURE IN THE FRAME, A METAL BLACK LAYER ON ONE SIDE OF THE SILICON MONOXIDE FILM, AND A PHOTO LAYER ON THE SIDE OF THE SILICON MONOXIDE FILM REMOTE FROM THAT BEARING THE METAL BLACK.
References Cited (Backward Citations)
US2739084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |