Patent US2304817A successfully refreshed from Google Patents.
US2304817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Patch test
Assignee: Individual
•
Filing: 1941-07-19
•
Granted: 1942-12-15
•
Expires: 1961-07-19
Abstract
No abstract record available.
Inventors
- 👤 Grozin Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:59
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/44; A61B5/441; A61B10/00; A61B10/0035; Y; Y10; Y10S; Y10S436/00; Y10S436/807; Y10S436/809; Y10S436/81; Y10S436/811
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1945-12-14 | 1946-06-15 | 1946-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-14 | 1950-06-15 | 1950-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-14 | 1954-06-15 | 1954-12-15 | $7700.00 | Window Closed / Lapsed |