US1405940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining the quantity of an appropriate chemical that should be added per unit of volume of water in order to fit it for use in the arts
Assignee: Individual
•
Filing: 1918-07-26
•
Granted: 1922-02-07
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Expires: 1938-07-26
Abstract
No abstract record available.
Inventors
- 👤 Rice Cyrus Wm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:22
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/02
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) | 1925-02-06 | 1925-08-08 | 1926-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-02-06 | 1929-08-08 | 1930-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-02-06 | 1933-08-08 | 1934-02-07 | $7700.00 | Window Closed / Lapsed |