Certificate of correction
Abstract
Abstract IN A METHOD FOR DRY CLEANING WHEREIN A DRY CLEANING SOLVENT CONTAINING DETERGENT, HAND AGENTS AND ACIDITY CONTROL AGENTS IS EMPLOYED TO WASH ARTICLES, THE SOLVENT AND ITS ADDITIVES ARE FILTERED AND PERIODICALLY DISTILLED TO REMOVE CONTAMINATES SUCH AS DIRT PARTICLES, DYES, FATTY ACIDS, AND WHEREIN THE ADDITIVES ARE DEPLETED DURING THE CLEANING OF THE ARTICLE, THE FILTRATION AND THE DISTILLATION, THE IMPROVEMENT WHICH COMPRISES INITIALLY EMPLOYING A SOLVENT COMPOSITIONS WHICH CONTAINS THE NECESSARY INGREDIENTS TO CLEAN PARTICLES, MAINTAIN THE ACIDITY OF THE SOLVENT AT A LEVEL TO PREVENT ODOR AND PERMIT WITHDRAWAL OF THE ARTICLES WITH A DESIRABLE HAND; FILTERING THE SOLVENT COMPOSITION; PERIODICALLY DISTILLING AT LEAST ABOUT FIVE PERCENT OF THE SOLVENT IN THE SYSTEM AND RETURNING ADDITIVE-FREE SOLVENT TO THE PROCESS; AND ADDING THE SAME SOLVENT COMPOSITION TO THE PROCESS WHEN MAKE-UP IS REQUIRED; THE RESULT BEING TO MAINTAIN BY A SINGLE PERIODIC ADDITION ALL OF THE NECESSARY INGREDIENTS TO PROVIDE A UNIFORM EFFICAENGAGING PORTION WHEREBY IT PROVIDES A TRANSITIONAL ZONE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |