Patent US1443191A successfully refreshed from Google Patents.
Patent US2941534A successfully refreshed from Google Patents.
US2941534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hair curlers for permanent waving
Assignee: Individual
•
Filing: 1956-04-12
•
Granted: 1960-06-21
•
Expires: 1976-04-12
Abstract
No abstract record available.
Inventors
- 👤 Otto Carl Louis
- 👤 Otto La Nelle Burnham
- 👤 Briton Joan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:57
CPC Classifications
A; A45; A45D; A45D2/00; A45D2/12; A45D2/24; A45D2/2435; Y; Y10; Y10S; Y10S132/00; Y10S132/902
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1894795A
Cited
US1919600A
Cited
US1995688A
Cited
US1965953A
Cited
US2077198A
Cited
US2156909A
Cited
US2288446A
Cited
US2600727A
Cited
US2758604A
Cited
US2720206A
Cited
US2752923A
Cited
US2793645A
Cited
US2842140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |