US2618636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis(2-morpholino-4-amino-1,3,5-triazyl-(6)-)-4,4'-diaminostilbene sulfonic and carboxylic acids
Assignee: GAF Chemicals Corp
•
Filing: 1948-08-24
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Granted: 1952-11-18
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Expires: 1968-08-24
Abstract
No abstract record available.
Inventors
- 👤 William W Williams
- 👤 William E Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:30
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/54; C07D251/68; D; D06; D06L; D06L4/00; D06L4/60; D06L4/657
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
A COMPOUND OF THE GENERAL FORMULA
References Cited (Backward Citations)
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US2427314A
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US2235480A
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US2171427A
Cited
US2306439A
Cited
CH233745A
Cited
US2376743A
Cited
US2399066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |