Patent US4112588A successfully refreshed from Google Patents.
Patent US2625516A successfully refreshed from Google Patents.
US2625516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desiccant
Assignee: Individual
•
Filing: 1950-09-13
•
Granted: 1953-01-13
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Expires: 1970-09-13
Abstract
No abstract record available.
Inventors
- 👤 George D Metzger
- 👤 Jr William Licht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:50
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A GRANULAR DESICCANT COMPOSED OF GRANULES EACH CONSISTING ESSENTIALLY OF ANHYDROUS CALCIUM SULPHATE HAVING A COATING THEREON OF AN ALKALI METAL SILICATE, THE WEIGHT OF THE COATING BEING ABOUT 4% TO 7% BY WEIGHT OF THE DESICCANT AND BEING SUFFICIENT TO PREVENT DUSTING OF THE GRANULES.
Claim 2
Dependent Claim
46 words
A GRANULAR DESICCANT COMPOSED OF GRANULES EACH CONSISTING ESSENTIALLY OF ANHYDROUS CALCIUM SULPHATE HAVING A COATING THEREON OF AN ALKALI METAL SILICATE, THE WEIGHT OF THE COATING BEING ABOUT 4% TO 7% BY WEIGHT OF THE DESICCANT AND BEING SUFFICIENT TO PREVENT DUSTING OF THE GRANULES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |