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US3470887A
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Method for straightening hair and composition of matter for use therewith
Assignee: NATCON CHEM CO Inc
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Filing: 1965-10-21
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Granted: 1969-10-07
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Kremer
- 👤 Jack Ashford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:35
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2540494A
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US2689815A
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US3171785A
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US3017328A
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US3025218A
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US3101300A
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US3330731A
Cited
US3242052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |