US3291576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrated sodium hydroxide
Assignee: Diversey Wyandotte Corp
•
Filing: 1963-12-24
•
Granted: 1966-12-13
•
Expires: 1983-12-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph V Otrhalek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:21
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1863791A
Cited
US2112813A
Cited
US2178694A
Cited
US2196595A
Cited
US2285300A
Cited
US2373257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |