US2450448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making hair retainers
Assignee: Individual
•
Filing: 1946-02-21
•
Granted: 1948-10-05
•
Expires: 1966-02-21
Abstract
No abstract record available.
Inventors
- 👤 Lester T Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:01
CPC Classifications
B; B29; B29C; B29C67/00; Y; Y10; Y10S; Y10S132/00; Y10S132/901; Y10S264/00; Y10S264/66; Y10S425/00; Y10S425/805; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/4979
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |