US2541886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aliphatic nitro compounds as azo coupling components
Assignee: GAF Chemicals Corp
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Filing: 1947-12-20
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Granted: 1951-02-13
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Expires: 1967-12-20
Abstract
No abstract record available.
Inventors
- 👤 Fred W Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A PROCESS FOR PRODUCING DIAZOTYPE PRINTS, INVOLVING EXPOSURE OF A SENSTITIZED LAYER COMPRISING A LIGHT SENSITITVE DIAZO COMPOUND TO LIGHT IN ACCORDANCE WITH AN ORIGINAL DESIGN TO BE COPIED, THE STEP WHICH COMPRISES COUPLING THE RESIDUAL DIAZO COMPOUND CONTAINED IN SAID LAYER WITH AN ALIPHATIC NITRO COMPOUND WHEREIN THE CARBON ATOM TO WHICH THE NITRO GROUP IS ATTACHED CARRIES AT LEAST ON ACTIVE HYDROGEN ATOM.
Claim 2
Dependent Claim
66 words
IN A PROCESS FOR PRODUCING DIAZOTYPE PRINTS, INVOLVING EXPOSURE OF A SENSTITIZED LAYER COMPRISING A LIGHT SENSITITVE DIAZO COMPOUND TO LIGHT IN ACCORDANCE WITH AN ORIGINAL DESIGN TO BE COPIED, THE STEP WHICH COMPRISES COUPLING THE RESIDUAL DIAZO COMPOUND CONTAINED IN SAID LAYER WITH AN ALIPHATIC NITRO COMPOUND WHEREIN THE CARBON ATOM TO WHICH THE NITRO GROUP IS ATTACHED CARRIES AT LEAST ON ACTIVE HYDROGEN ATOM.
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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |