US3469616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for regulating concentration in evaporators,in particular in multiple-effect evaporators
Assignee: Individual
•
Filing: 1967-01-31
•
Granted: 1969-09-30
•
Expires: 1987-01-31
Abstract
No abstract record available.
Inventors
- 👤 Pierre Robert Laguilharre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:49
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D1/00; B01D1/0082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1028738A
Cited
US2576496A
Cited
US3035634A
Cited
FR1176344A
Cited
GB956086A
Cited
US3203466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |