US2980625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersions of benzimidazolylstilbene whitening and brightening agents and production thereof
Assignee: STWB Inc
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Filing: 1959-05-11
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Granted: 1961-04-18
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Expires: 1979-05-11
Abstract
No abstract record available.
Inventors
- 👤 Nathan N Crounse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:50
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/60; D06L4/664
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
THE PROCESS FOR OBTAINING A UNIFORM DISPERSION OF A RELATIVELY SMALL QUANTITY OF A BENZIMIDAZOLYLSTILBENE WHITENING AND BRIGHTENING AGENT HAVING THE FORMULA
Claim 2
Dependent Claim
22 words
THE PROCESS FOR OBTAINING A UNIFORM DISPERSION OF A RELATIVELY SMALL QUANTITY OF A BENZIMIDAZOLYLSTILBENE WHITENING AND BRIGHTENING AGENT HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |