US2247440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scalp massaging device
Assignee: Individual
•
Filing: 1938-08-03
•
Granted: 1941-07-01
•
Expires: 1958-08-03
Abstract
No abstract record available.
Inventors
- 👤 Hempel Martin Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
A; A61; A61H; A61H7/00; A61H7/002; A61H7/004; A61H7/005; A61H15/00; A61H15/0078; A61H15/0085; A61H2015/0007; A61H2015/0028; A61H2015/0035; A61H2205/00; A61H2205/02; A61H2205/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-06-30 | 1944-12-30 | 1945-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-30 | 1948-12-30 | 1949-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-30 | 1952-12-30 | 1953-07-01 | $7700.00 | Window Closed / Lapsed |