US1643243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
hatfield
Assignee: —
•
Filing: —
•
Granted: 1927-09-20
•
Expires: 1944-09-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:57
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/22; G01N1/2247; G01N1/2252
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) | 1930-09-19 | 1931-03-21 | 1931-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-09-19 | 1935-03-21 | 1935-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-09-19 | 1939-03-21 | 1939-09-20 | $7700.00 | Window Closed / Lapsed |