US3288609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic apparatus and process for treating sheets with a liquid
Assignee: Polaroid Corp
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Filing: 1964-10-12
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Granted: 1966-11-29
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Expires: 1984-10-12
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
- 👤 Richard J Chen
- 👤 Gold Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:09
CPC Classifications
G; G03; G03D; G03D9/00; G03C; G03C5/00; G03C5/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF TREATING AN EXPOSED PHOTOSENSITIVE IMAGE-RECORDING SHEET WITH A LIQUID TO PRODUCE A VISIBLE IMAGE THEREIN COMPRISING: PROVIDING A BODY OF AN AQUEOUS LIQUID INCLUDING REAGENTS CAPABLE OF REACTING WITH DIFFERENTIALLY EXPOSED PHOTOSENESITIVE IMAGE-RECORDING MATERIAL TO PRODUCE A VISIBLE IMAGE; FLOATING A LAYER OF ANOTHER LIQUID SUBSTANTIALLY NONVOLATILE AT NORMAL TEMPERATURES AND IMMISCIBLE WITH SAID AQUEOUS LIQUID ON THE SURFACE OF THE LATTER TO PROTECT SAID BODY OF AQUEOUS LIQUID FROM THE ATMOSPHERE; AND ADVANCING SAID SHEET INTO AND FORM SAID BODY OF LIQUID AT A RATE SUCH THAT SAID SHEET ABSORBS A PREDETERMINED AMOUNT OF SAID AAQUEOUS LIQUID.
Claim 2
Independent Claim
101 words
THE METHOD OF TREATING AN EXPOSED PHOTOSENSITIVE IMAGE-RECORDING SHEET WITH A LIQUID TO PRODUCE A VISIBLE IMAGE THEREIN COMPRISING: PROVIDING A BODY OF AN AQUEOUS LIQUID INCLUDING REAGENTS CAPABLE OF REACTING WITH DIFFERENTIALLY EXPOSED PHOTOSENESITIVE IMAGE-RECORDING MATERIAL TO PRODUCE A VISIBLE IMAGE; FLOATING A LAYER OF ANOTHER LIQUID SUBSTANTIALLY NONVOLATILE AT NORMAL TEMPERATURES AND IMMISCIBLE WITH SAID AQUEOUS LIQUID ON THE SURFACE OF THE LATTER TO PROTECT SAID BODY OF AQUEOUS LIQUID FROM THE ATMOSPHERE; AND ADVANCING SAID SHEET INTO AND FORM SAID BODY OF LIQUID AT A RATE SUCH THAT SAID SHEET ABSORBS A PREDETERMINED AMOUNT OF SAID AAQUEOUS LIQUID.
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |