Patent US2690276A successfully refreshed from Google Patents.
Patent US3514376A successfully refreshed from Google Patents.
US3514376A
Expired / Lapsed
US
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Control of scaling in evaporators
Assignee: WR Grace and Co
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Filing: 1969-06-20
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Granted: 1970-05-26
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Expires: 1989-06-20
Abstract
No abstract record available.
Inventors
- 👤 Murrell L Salutsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/30; C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C23; C23F; C23F14/00; C23F14/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA462907A
Cited
US2783200A
Cited
US3023162A
Cited
US2980610A
Cited
GB906531A
Cited
US3293152A
Cited
US3247106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |