US1647848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inter
Assignee: —
•
Filing: —
•
Granted: 1927-11-01
•
Expires: 1944-11-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:03
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/18; F; F01; F01P; F01P3/00; F01P3/02; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/365; F02F11/00; F02F11/002
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 |