US1509904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polishing machine
Assignee: Alcoa Corp
•
Filing: 1920-08-21
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Granted: 1924-09-30
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Expires: 1940-08-21
Abstract
No abstract record available.
Inventors
- 👤 Robert F Salisbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:35
CPC Classifications
B; B24; B24B; B24B47/00; B24B47/02; B24B47/04
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) | 1927-09-30 | 1928-03-31 | 1928-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-09-30 | 1932-03-31 | 1932-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-09-30 | 1936-03-31 | 1936-09-30 | $7700.00 | Window Closed / Lapsed |