Patent US3329622A successfully refreshed from Google Patents.
US3329622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel product and process
Assignee: PPG Industries Inc
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Filing: 1964-01-23
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Granted: 1967-07-04
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Expires: 1984-01-23
Abstract
No abstract record available.
Inventors
- 👤 William R Harris
- 👤 Ralph W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:28
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04; C01D1/20; C01D1/22; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A PARTICLE CONSISTING ESSENTIALLY OF A CORE OF ALKALI METAL CARBONATE ENCASED IN A SHELL OF ALKALI METAL HYDROXIDE AND HAVING AN EFFECTIVE ALKALI METAL OXIDE CONTENT ABOVE THAT OF THE ALKALI METAL CARBONATE AND BELOW THAT OF THE ALKALI METAL HYDROXIDE.
Claim 2
Dependent Claim
42 words
A PARTICLE CONSISTING ESSENTIALLY OF A CORE OF ALKALI METAL CARBONATE ENCASED IN A SHELL OF ALKALI METAL HYDROXIDE AND HAVING AN EFFECTIVE ALKALI METAL OXIDE CONTENT ABOVE THAT OF THE ALKALI METAL CARBONATE AND BELOW THAT OF THE ALKALI METAL HYDROXIDE.
Claim 3
Independent Claim
110 words
THE METHOD OF MANUFACTURE OF PARTICLES FROM DENSE SODA ASH AND SODIUM HYDROXIDE WHICH PARTICLES ARE LESS FRIABLE AND HAVE HIGHER EFFECTIVE NA2O CONTENT THAN THE DENSE SODA ASH WHICH COMPRISES MIXING BY WEIGHT ABOUT 84 TO ABOUT 90 PERCENT PARTICULATE DENSE SODA ASH WITH ABOUT 16 TO ABOUT 10 PERCENT SODIUM HYDROXIDE, SAID SODIUM HYDROXIDE BEING IN AQUEOUS SOLUTION AND FEEDING SAID MIXTURE TO A FLUIDIZED BED OPERATING IN AIR WITH A BED TEMPERATURE BETWEEN ABOUT 130 AND ABOUT 200*C. TO EVAPORATE THE WATER FROM THE MIXTURE THEREBY TO OBTAIN INDIVIDUAL PARTICLES OF PRODUCTS CONSISTING ESSENTIALLY OF A CORE OF SODA ASH ENCASED IN A SHELL OF SODIUM HYDROXIDE.
Claim 4
Independent Claim
110 words
THE METHOD OF MANUFACTURE OF PARTICLES FROM DENSE SODA ASH AND SODIUM HYDROXIDE WHICH PARTICLES ARE LESS FRIABLE AND HAVE HIGHER EFFECTIVE NA2O CONTENT THAN THE DENSE SODA ASH WHICH COMPRISES MIXING BY WEIGHT ABOUT 84 TO ABOUT 90 PERCENT PARTICULATE DENSE SODA ASH WITH ABOUT 16 TO ABOUT 10 PERCENT SODIUM HYDROXIDE, SAID SODIUM HYDROXIDE BEING IN AQUEOUS SOLUTION AND FEEDING SAID MIXTURE TO A FLUIDIZED BED OPERATING IN AIR WITH A BED TEMPERATURE BETWEEN ABOUT 130 AND ABOUT 200*C. TO EVAPORATE THE WATER FROM THE MIXTURE THEREBY TO OBTAIN INDIVIDUAL PARTICLES OF PRODUCTS CONSISTING ESSENTIALLY OF A CORE OF SODA ASH ENCASED IN A SHELL OF SODIUM HYDROXIDE.
References Cited (Backward Citations)
US2586818A
Cited
US3231413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |