Patent US1839573A successfully refreshed from Google Patents.
US1839573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing blood
Assignee: HERBERT KILLIPS
•
Filing: 1928-10-15
•
Granted: 1932-01-05
•
Expires: 1948-10-15
Abstract
No abstract record available.
Inventors
- 👤 Andrews C Merrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:47
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/02; C12Q1/04
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) | 1935-01-04 | 1935-07-06 | 1936-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-01-04 | 1939-07-06 | 1940-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-01-04 | 1943-07-06 | 1944-01-05 | $7700.00 | Window Closed / Lapsed |