Patent JPS56163128A successfully refreshed from Google Patents.
US2533958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical heating pad, particularly useful in permanent waving of human hair
Assignee: RAYMOND E REED
•
Filing: 1946-04-23
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Granted: 1950-12-12
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Expires: 1966-04-23
Abstract
No abstract record available.
Inventors
- 👤 Morris J Root
- 👤 Raymond E Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:27
CPC Classifications
A; A45; A45D; A45D7/00; A45D7/06; A45D7/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2110677A
Cited
US2318420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |