US3586520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerated cellulose sponge resistant to pigment bleeding and fungicidal degradation and process
Assignee: Mapa Spontex Inc
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Filing: 1969-03-28
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Granted: 1971-06-22
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Expires: 1989-03-28
Abstract
Abstract REGENERATED CELLULOSE SPONGES ARE IMMERSED IN A DISPERSION OF A FUNGICIDALLY ACTIVE METAL SALT OF DIALKYL DITHIOCARBAMIC ACID IN WATER AND THEN DRIED. A PREFERRED EMBODIMENT USES A SMALL AMOUNT OF A ZINC SALT OF 2-MERCAPTOBENZOTHIAZOLE IN THE DISPERSION. THIS TREATMENT NOT ONLY PRODUCES PROTECTION FROM FUNGICIDAL ATTACK, BUT ALSO REDUCES THE TENDENCY OF THE COLOR PIGMENT TO LEACH OUT OF THE SPONGE WHEN IMMERSED IN WATER.
Inventors
- 👤 Harold L Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39
Claims Analysis
Total Claims: 0
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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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |