Patent US3345993A successfully refreshed from Google Patents.
US3345993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam end wrap and permanent waving process employing same
Assignee: Procter and Gamble Co
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Filing: 1964-08-13
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Granted: 1967-10-10
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Expires: 1984-08-13
Abstract
No abstract record available.
Inventors
- 👤 John W Haefele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:28
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/87; A61Q; A61Q5/00; A61Q5/04; A61K2800/00; A61K2800/80; A61K2800/87
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
THE PROCESS OF IMPARTING A UNIFROM WAVE TO HAIR WHICH COMPRISES THE STEPS OF FORMING THE HAIR INTO TRESSES, WRAPPING ABOUT EACH TRESS A PERMEABLE, FLEXIBLE WAFER OF POLYURETHANE FOAM HAVING A THICHMESS WITHIN THE RANGE FROM ABOUT 1/16 INCH TO ABOUT 1/64 INCH, WINDING EACH TRESS UPON A CYLINDRICAL BODY, SATURATING EACH WOUND STRESS WITH A KERATIN-REDUCING COMPOSITION AND THEREAFTER NEUTRALIZING THE ACTION ON THE HAIR OF SAID KERATIN-REDUCING COMPOSITION.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |