Patent US2774651A successfully refreshed from Google Patents.
US2774651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying agent and process of making the same
Assignee: Godfrey L Cabot Inc
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Filing: 1952-11-07
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Granted: 1956-12-18
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Expires: 1972-11-07
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Loftman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:31
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR PRODUCING A DESICCANT WHICH COMPRISES THE STEPS OF REACTING CALCIUM SILCATE WITH A SOLUTION OF SULFURIC ACID HAVING A CONCENTRATION OF BETWEEN 10 AND 35%, AND IN A MOLAR AMOUNT OF AT LEAST 95% OF THE MOLAR AMOUNT OF CALCIUM SILICATE, AND AGGLOMERATING THE RESULT-
Claim 2
Dependent Claim
48 words
A PROCESS FOR PRODUCING A DESICCANT WHICH COMPRISES THE STEPS OF REACTING CALCIUM SILCATE WITH A SOLUTION OF SULFURIC ACID HAVING A CONCENTRATION OF BETWEEN 10 AND 35%, AND IN A MOLAR AMOUNT OF AT LEAST 95% OF THE MOLAR AMOUNT OF CALCIUM SILICATE, AND AGGLOMERATING THE RESULT-
References Cited (Backward Citations)
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US1571054A
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US1715439A
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US1909008A
Cited
US2402370A
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US2462798A
Cited
US2625516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |