Patent US3056645A successfully refreshed from Google Patents.
US3056645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of bleaching sized cotton fabrics
Assignee: PPG Industries Inc
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Filing: 1959-10-09
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Granted: 1962-10-02
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Expires: 1979-10-09
Abstract
No abstract record available.
Inventors
- 👤 Julius A Anderson
- 👤 Raymond R Currier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/20; D06L4/22; D06L4/23; D06L4/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN THE BLEACHING OF A SIZED FABRIC, THE STEPS COMPRISING INTRODUCING THE FABRIC INTO AN AQUEOUS SOLUTION OF AN ALKALI HYDROXIDE AND A HYPOCHLORITE, MAINTAINING THE FABRIC IN CONTACT WITH THE AQUEOUS SOLUTION OF HYPOCHLORITE AND ALKALI METAL HYDROXIDE FOR A PERIOD OF TIME SUFFICIENT TO SUBSTANTIALLY IMPREGNATE THE FABRIC WITH SOLUTION, HEATING THE FABRIC IN AN ATMOSPHERE OF STEAM FOR A PERIOD OF TIME SUFFICIENT TO DISPERSE THE MOTES AND RENDER
Claim 2
Dependent Claim
72 words
IN THE BLEACHING OF A SIZED FABRIC, THE STEPS COMPRISING INTRODUCING THE FABRIC INTO AN AQUEOUS SOLUTION OF AN ALKALI HYDROXIDE AND A HYPOCHLORITE, MAINTAINING THE FABRIC IN CONTACT WITH THE AQUEOUS SOLUTION OF HYPOCHLORITE AND ALKALI METAL HYDROXIDE FOR A PERIOD OF TIME SUFFICIENT TO SUBSTANTIALLY IMPREGNATE THE FABRIC WITH SOLUTION, HEATING THE FABRIC IN AN ATMOSPHERE OF STEAM FOR A PERIOD OF TIME SUFFICIENT TO DISPERSE THE MOTES AND RENDER
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) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |