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Patent US1647865A successfully refreshed from Google Patents.
US1647865A
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Marking for hemacytometers
Assignee: C A Hausser & Son
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Filing: 1924-08-06
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Granted: 1927-11-01
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Expires: 1944-08-06
Abstract
No abstract record available.
Inventors
- 👤 Hausser Carl Adolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:26
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/34; B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L2300/00; B01L2300/02; B01L2300/025; B01L2300/028; B01L2300/08; B01L2300/0809; B01L2300/0822
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) | 1930-10-31 | 1931-05-02 | 1931-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-10-31 | 1935-05-02 | 1935-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-10-31 | 1939-05-02 | 1939-11-01 | $7700.00 | Window Closed / Lapsed |