Patent US2518249A successfully refreshed from Google Patents.
US2518249A
Expired / Lapsed
US
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Diphenyl-4, 4'-di (sulfonyl azide)
Assignee: Monsanto Chemicals Ltd
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Filing: 1949-07-09
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Granted: 1950-08-08
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Expires: 1969-07-09
Abstract
No abstract record available.
Inventors
- 👤 John B Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:25
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
DIPHENYL-4,4''-DI(SULFONYL AZIDE).
Claim 2
Dependent Claim
2 words
DIPHENYL-4,4''-DI(SULFONYL AZIDE).
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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |