Patent US4256881A successfully refreshed from Google Patents.
US4256881A
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Blocked benzotriazole compounds as development restrainer precursors
Assignee: Nortel Networks Ltd
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Filing: 1979-10-18
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Granted: 1981-03-17
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Expires: 1999-10-18
Abstract
Abstract Benzotriazole compounds employed as development restrainer precursors are described having on one nitrogen atom an alkali-hydrolyzable, N,N-disubstituted carbamoyl group. The compounds may have the following formula: ##STR1## wherein: R 1 and R 2 each represent a substituted or unsubstituted alicyclic, aliphatic, aromatic or heterocyclic moiety, or may be taken together with the nitrogen to which they are attached to form a heterocyclic ring; and R 3 , R 4 , R 5 and R 6 each represent hydrogen, nitro, lower alkyl, halogen, carbamoyl, sulfamoyl, RCONH-- or RSO 2 NH--, wherein R is lower alkyl or aryl.
Inventors
- 👤 Michael J. Simons
- 👤 David T. Southby
- 👤 Hans G. Ling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:59
CPC Classifications
G; G03; G03C; G03C8/00; C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
A compound having either of the following formulas: ##STR9## wherein: R 1 and R 2 together complete a morpholine ring or a piperidine ring; and R 3 , R 4 , R 5 and R 6 each represent hydrogen, nitro, lower alkyl, halogen, carbamoyl, sulfamoyl, RCONH-, or RSO 2 NH-, wherein R is lower alkyl or aryl of 6 to 10 carbon atoms.
Claim 2
Dependent Claim
63 words
A compound having either of the following formulas: ##STR9## wherein: R 1 and R 2 together complete a morpholine ring or a piperidine ring; and R 3 , R 4 , R 5 and R 6 each represent hydrogen, nitro, lower alkyl, halogen, carbamoyl, sulfamoyl, RCONH-, or RSO 2 NH-, wherein R is lower alkyl or aryl of 6 to 10 carbon atoms.
Claim 3
Dependent Claim
16 words
The compound of claim 1 wherein R 1 and R 2 together complete a morpholine ring.
Claim 4
Dependent Claim
16 words
The compound of claim 1 wherein R 1 and R 2 together complete a piperidine ring.
Claim 5
Dependent Claim
9 words
The compound of claim 1 having the formula: ##STR10##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |