Patent US6543456B1 successfully refreshed from Google Patents.
US2890621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic printing method and apparatus
Assignee: General Electric Co
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Filing: 1954-09-24
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Granted: 1959-06-16
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Expires: 1974-09-24
Abstract
No abstract record available.
Inventors
- 👤 Chauncey G Suits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:40
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/08; Y; Y10; Y10S; Y10S430/00; Y10S430/152
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE MEHTOD OF ELIMINATING THE EFFECT OF SCRATCHES ON A PHOTOGRAPHIC NEGATIVE WHEN PROJECTING LIGHT THERETHROUGH FOR THE PRODUCTION OF ENLARGED IMAGES WHICH COMPRISES POSITIONING SAID NEGATIVE IN A TRANSPARENT LIQUID POLYSILOXANE HAVING A REFRACTIVE INDEX WITHIN THE LIMITS OF ABOUT 1.35 TO 1.70 AND PROJECTING LIGHT THROUGH SAID NEGATIVE AND SAID POLYSILOXANE.
Claim 2
Dependent Claim
53 words
THE MEHTOD OF ELIMINATING THE EFFECT OF SCRATCHES ON A PHOTOGRAPHIC NEGATIVE WHEN PROJECTING LIGHT THERETHROUGH FOR THE PRODUCTION OF ENLARGED IMAGES WHICH COMPRISES POSITIONING SAID NEGATIVE IN A TRANSPARENT LIQUID POLYSILOXANE HAVING A REFRACTIVE INDEX WITHIN THE LIMITS OF ABOUT 1.35 TO 1.70 AND PROJECTING LIGHT THROUGH SAID NEGATIVE AND SAID POLYSILOXANE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |