US2674533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions and processes for the development of silver halide elements
Assignee: Polaroid Corp
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Filing: 1952-07-10
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Granted: 1954-04-06
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Expires: 1972-07-10
Abstract
No abstract record available.
Inventors
- 👤 Robert B Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:40
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
AS A NEW DEVELOPER COMPOSITION FOR THE FORMATION OF SILVER TRANSFER PRINTS, AN AQUEOUS SOLUTION COMPRISING AN ALKALI, A SILVER HALIDE SOLVENT FIXER AND BIS-BENZENE-SULFONYL HYDRAZIDE.
Claim 2
Dependent Claim
26 words
AS A NEW DEVELOPER COMPOSITION FOR THE FORMATION OF SILVER TRANSFER PRINTS, AN AQUEOUS SOLUTION COMPRISING AN ALKALI, A SILVER HALIDE SOLVENT FIXER AND BIS-BENZENE-SULFONYL HYDRAZIDE.
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) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |