US748525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of drying sulfate of aluminium.
Assignee: Individual
•
Filing: 1903-10-20
•
Granted: 1903-12-29
•
Expires: 1923-10-20
Abstract
No abstract record available.
Inventors
- 👤 Robert S Perry
- 👤 Herman G Schanche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:28
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/68; C01F7/74
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) | 1906-12-28 | 1907-06-29 | 1907-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-12-28 | 1911-06-29 | 1911-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-12-28 | 1915-06-29 | 1915-12-29 | $7700.00 | Window Closed / Lapsed |