Patent US2812441A successfully refreshed from Google Patents.
US2812441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray cassette warpproof bakelite front
Assignee: Individual
•
Filing: 1951-12-17
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Granted: 1957-11-05
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Expires: 1971-12-17
Abstract
No abstract record available.
Inventors
- 👤 Charles B Kamiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:21
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
IN AN X-RAY CASSETTE FRONT, THE COMBINATION WHICH COMPRISES A BAKELITE BODY, A LAYER OF ALUMINUM ON EACH SIDE OF THE BAKELITE BODY, AND LAYERS OF BAKELITE ON THE OUTER SURFACES OF SAID ALUMINUM LAYERS.
Claim 2
Dependent Claim
35 words
IN AN X-RAY CASSETTE FRONT, THE COMBINATION WHICH COMPRISES A BAKELITE BODY, A LAYER OF ALUMINUM ON EACH SIDE OF THE BAKELITE BODY, AND LAYERS OF BAKELITE ON THE OUTER SURFACES OF SAID ALUMINUM LAYERS.
References Cited (Backward Citations)
US2344824A
Cited
US966696A
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US1662860A
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US1687952A
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GB483314A
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GB497180A
Cited
US2230823A
Cited
US2247451A
Cited
US2499134A
Cited
US2384500A
Cited
US2505562A
Cited
US2666855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |