US2997467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazo nitrogen heterocycles as lithographic sensitizers
Assignee: GAF Chemicals Corp
•
Filing: 1958-04-21
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Granted: 1961-08-22
•
Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 Robert J Cox
- 👤 Ralph G D Moore
- 👤 Mark L Moskowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
AN INDIAZOLE OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
6 words
AN INDIAZOLE OF THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
7 words
AN INDIAZOLE OF THE FOLLOWING GENERAL FORMULA:
Claim 4
Dependent Claim
7 words
AN INDIAZOLE OF THE FOLLOWING GENERAL FORMULA:
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |