Patent US3287124A successfully refreshed from Google Patents.
US3287124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfone-hydroxylamines as photographic developers
Assignee: Polaroid Corp
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Filing: 1963-06-26
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Granted: 1966-11-22
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Expires: 1983-06-26
Abstract
No abstract record available.
Inventors
- 👤 Green Milton
- 👤 Adnan A Sayigh
- 👤 Ulrich Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:06
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/24; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3014; G03C8/00; G03C8/02; G03C8/04; G03C8/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
AS A NEW DEVELOPER COMPOSITION, AN AQUEOUS SOLUTION COMPRISING AN ALKALINE MATERIAL, A SILVER HALIDE SOLVENT, AND A SILVER HALIDE DEVELOPING AGENT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS WITHIN TTHE FORMULA:
Claim 2
Dependent Claim
32 words
AS A NEW DEVELOPER COMPOSITION, AN AQUEOUS SOLUTION COMPRISING AN ALKALINE MATERIAL, A SILVER HALIDE SOLVENT, AND A SILVER HALIDE DEVELOPING AGENT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS WITHIN TTHE FORMULA:
References Cited (Backward Citations)
US2750357A
Cited
US2857276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |