US2023588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polishing machine
Assignee: Individual
•
Filing: 1933-06-24
•
Granted: 1935-12-10
•
Expires: 1953-06-24
Abstract
No abstract record available.
Inventors
- 👤 Ernest R Heckroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:35
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/02; A47L11/10; A47L11/12; A47L11/4036; A47L11/4038; A47L11/4052; A47L11/4058; A47L11/4063; A47L11/4069
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) | 1938-12-09 | 1939-06-10 | 1939-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-12-09 | 1943-06-10 | 1943-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-12-09 | 1947-06-10 | 1947-12-10 | $7700.00 | Window Closed / Lapsed |