US3477829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium hydroxide monohydrate crystallization process
Assignee: Chicago Bridge and Iron Co
•
Filing: 1966-02-25
•
Granted: 1969-11-11
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Expires: 1986-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jay D Dockendorff
- 👤 Anthony N Chirico
- 👤 Bruce P Sanfilippo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:31
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04; C01D1/28; C01D1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US971144A
Cited
US1806096A
Cited
US1865281A
Cited
US2112813A
Cited
US2129464A
Cited
US2178694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |