US2536668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric permanent wave device
Assignee: HECKMAN Co
•
Filing: 1947-09-06
•
Granted: 1951-01-02
•
Expires: 1967-09-06
Abstract
No abstract record available.
Inventors
- 👤 Suter Marcel
- 👤 Chedister Conkling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:12
CPC Classifications
A; A45; A45D; A45D4/00; A45D4/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2108240A
Cited
US2159358A
Cited
US909924A
Cited
US1781244A
Cited
GB357608A
Cited
US1972186A
Cited
US1980475A
Cited
US2149153A
Cited
USRE21994E
Cited
US2165552A
Cited
US2183023A
Cited
US2216654A
Cited
US2231695A
Cited
US2167831A
Cited
US2363645A
Cited
US2204936A
Cited
US2265920A
Cited
US2386168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |