Patent US3307952A successfully refreshed from Google Patents.
US3307952A
Expired / Lapsed
US
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Formation of diazo couplers in situ
Assignee: International Business Machines Corp
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Filing: 1963-11-20
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Granted: 1967-03-07
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Expires: 1983-11-20
Abstract
No abstract record available.
Inventors
- 👤 Claude M Aebi
- 👤 Leon A Teuscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:18
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58; G03C1/585; F; F24; F24F; F24F6/00; F24F6/02; F24F6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A COMPOSITION OF MATTER COMPRISING A LIGHT-SENSITIVE DIAZONIUM COMPOUND AND 1,5-DIPHENYL1-3-PENTANOL-1,5DIONE.
Claim 2
Dependent Claim
11 words
A COMPOSITION OF MATTER COMPRISING A LIGHT-SENSITIVE DIAZONIUM COMPOUND AND 1,5-DIPHENYL1-3-PENTANOL-1,5DIONE.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |