Patent US3324221A successfully refreshed from Google Patents.
US3324221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soda ash compaction
Assignee: FMC Corp
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Filing: 1965-05-27
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Granted: 1967-06-06
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Expires: 1985-05-27
Abstract
No abstract record available.
Inventors
- 👤 Robert D Hulse
- 👤 William F Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:33
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/35; C01D7/37; C01D7/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
PROCESS FOR COMPRESSING SODA ASH INTO A HIGHLY DENSE COMPACT WHICH COMPRISES COMPRESSING THE SODA ASH UNDER PRESSURE SUFFICIENT TO FORM A HARD, DENSE COMPACT WHILE SIMULTANEOUSLY MAINTAINING THE SODA ASH AT A TEMPERATURE OF ABOVE ABOUT 450*C. BUT BELOW THE FUSION TEMPERATURE OF THE SODA ASH DURING THE COMPRESSION.
Claim 2
Dependent Claim
50 words
PROCESS FOR COMPRESSING SODA ASH INTO A HIGHLY DENSE COMPACT WHICH COMPRISES COMPRESSING THE SODA ASH UNDER PRESSURE SUFFICIENT TO FORM A HARD, DENSE COMPACT WHILE SIMULTANEOUSLY MAINTAINING THE SODA ASH AT A TEMPERATURE OF ABOVE ABOUT 450*C. BUT BELOW THE FUSION TEMPERATURE OF THE SODA ASH DURING THE COMPRESSION.
References Cited (Backward Citations)
US1979151A
Cited
US2431095A
Cited
US2535180A
Cited
US2862887A
Cited
US2862809A
Cited
US3116137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |