US2500554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for the permanent waving of hair
Assignee: Individual
•
Filing: 1948-01-28
•
Granted: 1950-03-14
•
Expires: 1968-01-28
Abstract
No abstract record available.
Inventors
- 👤 Macdonald William
- 👤 Macdonald Hugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:09
CPC Classifications
A; A45; A45D; A45D4/00; A45D4/08; A45D4/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB119094A
Cited
US1595272A
Cited
US1990547A
Cited
GB365601A
Cited
US1901892A
Cited
US2003830A
Cited
US2323478A
Cited
US2316505A
Cited
US2379580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |