Patent US2497065A successfully refreshed from Google Patents.
Patent US2303397A successfully refreshed from Google Patents.
US2303397A
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Alkaline detergent
Assignee: Hall Labs LLC
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Filing: 1939-05-01
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Granted: 1942-12-01
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Expires: 1959-05-01
Abstract
No abstract record available.
Inventors
- 👤 Schwartz Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:03
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D3/00; C11D3/0005; C11D3/0073; C11D7/04; C11D7/06; C11D7/10; C11D7/12; C11D7/14; C11D7/16; C23; C23F; C23F11/00; C23F11/06; C23G; C23G1/00; C23G1/14; C23G1/16
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) | 1945-11-30 | 1946-06-01 | 1946-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-11-30 | 1950-06-01 | 1950-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-11-30 | 1954-06-01 | 1954-12-01 | $7700.00 | Window Closed / Lapsed |