US4002605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium and magnesium salts of 4-(2-hydroxy-1-naphthylazo)-1-naphthalenesulfonic acid for dyeing fiberglass
Assignee: Wyeth Holdings LLC
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Filing: 1974-08-28
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Granted: 1977-01-11
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Expires: 1994-08-28
Abstract
Abstract Dyes of the formula: ##STR1## wherein M is a metal selected from calcium and magnesium and provided that where M is calcium the dye is in the beta crystalline form are superior dyes for the dyeing of fiberglass in that they are resistant to crystal growth in dye pastes and recycle process water in the dyeing of fiberglass. Thus, in the spray dyeing of the fiberglass the dyes do not tend to clog the nozzle of the spraying device as do the corresponding salts of monovalent metals, such as the sodium salt.
Inventors
- 👤 Richard Benjamin Balsley
- 👤 Herbert Soffer
- 👤 Woodrow Wilson Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:58
CPC Classifications
C; C09; C09B; C09B63/00; C09B63/005; C03; C03C; C03C25/00; C03C25/10; C03C25/465; C03C25/475; C09B29/00; C09B29/10; C09B29/103
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A dye represented by the formula: ##STR3## where M is selected from the group consisting of calcium and magnesium; provided that where M is calcium, said dye is characterized by an X-ray diffraction pattern with lines at interplanar spacings in Angstroms of 17.4, 8.66, 7.62 and 3.54 and relative intensities of 45, 10, 100 and 10, respectively.
Claim 2
Dependent Claim
57 words
A dye represented by the formula: ##STR3## where M is selected from the group consisting of calcium and magnesium; provided that where M is calcium, said dye is characterized by an X-ray diffraction pattern with lines at interplanar spacings in Angstroms of 17.4, 8.66, 7.62 and 3.54 and relative intensities of 45, 10, 100 and 10, respectively.
Claim 3
Dependent Claim
10 words
A dye according to claim 1 wherein M is calcium.
Claim 4
Dependent Claim
10 words
A dye according to claim 1 wherein M is magnesium.
References Cited (Backward Citations)
US356672A
Cited
US1016307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |