US3669977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel cyclic compositions
Assignee: JP Stevens and Co Inc
•
Filing: 1970-02-24
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Granted: 1972-06-13
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Expires: 1990-02-24
Abstract
Abstract This invention concerns the preparation of novel cyclic N,N''substituted sulfamide derivatives and to their application to hydroxyl-containing polymeric substrates as modifying agents.
Inventors
- 👤 Giuliana C Tesoro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:15
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/10; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/438
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
16 words
A cyclic N,N''-substituted sulfamide of claim 1 wherein R'' is hydrogen and R is hydroxymethyl (-CH2OH).
Claim 2
Dependent Claim
13 words
A cyclic N,N''-substituted sulfamide of claim 1 wherein R and R'' are hydrogen.
Claim 3
Dependent Claim
16 words
A cyclic N,N''-substituted sulfamide of claim 1 wherein R'' is methyl and R is hydroxymethyl (-CH2OH).
References Cited (Backward Citations)
US3186998A
Cited
US3512922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |