US1645142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of solidifying aluminum chloride
Assignee: CLIFFORD W HUMPHREY
•
Filing: 1923-05-29
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Granted: 1927-10-11
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Expires: 1943-05-29
Abstract
No abstract record available.
Inventors
- 👤 Clifford W Humphrey
- 👤 Donald S Mckittrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:55
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/56
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) | 1930-10-10 | 1931-04-11 | 1931-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-10-10 | 1935-04-11 | 1935-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-10-10 | 1939-04-11 | 1939-10-11 | $7700.00 | Window Closed / Lapsed |