US3383180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization of large particle sized ammonium perchlorate
Assignee: Hooker Chemical Corp
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Filing: 1965-04-16
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Granted: 1968-05-14
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Expires: 1985-04-16
Abstract
No abstract record available.
Inventors
- 👤 Richard J Kralik
- 👤 Lewis E Tufts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:40
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/16; C01B11/18; C01B11/185; B; B01; B01D; B01D9/00; B01D9/0018; B01D9/0022; B01D9/0036; Y; Y10; Y10S; Y10S159/00; Y10S159/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR PRODUCING HIGH QUALIITY AMMONIUM PERCHLORATE CRYSTALS COMPRISING MAINTAINING A CRYSTALLIZATION ZONE HAVING THEREIN AN AQUEOUS SLURRY SUPERSATURATED WITH AMMONIUM PERCHLORATE, MAINTAINING SAID AQUEOUS SOLUTION AT A TEMPERATURE OF 55 TO 110 DEGREES CENTIGRADE, FEEDING TO SAID CRYSTALLIZATION ZONE, A HOT, CONCENTRATED, AQUEOUS SOLUTION CONTAINING AMMONIUM PERCHLORATE, MAINTAINING AN EVAPORATING ZONE WITHIN SAID CRYSTALLIZATION ZONE UNDER SUBATMOSPHERIC PRESSURE, AND EVAPORATING WATER FROM SAID CRYSTALLIZATION ZONE, WHILE MAINTAINING A
Claim 2
Dependent Claim
70 words
A PROCESS FOR PRODUCING HIGH QUALIITY AMMONIUM PERCHLORATE CRYSTALS COMPRISING MAINTAINING A CRYSTALLIZATION ZONE HAVING THEREIN AN AQUEOUS SLURRY SUPERSATURATED WITH AMMONIUM PERCHLORATE, MAINTAINING SAID AQUEOUS SOLUTION AT A TEMPERATURE OF 55 TO 110 DEGREES CENTIGRADE, FEEDING TO SAID CRYSTALLIZATION ZONE, A HOT, CONCENTRATED, AQUEOUS SOLUTION CONTAINING AMMONIUM PERCHLORATE, MAINTAINING AN EVAPORATING ZONE WITHIN SAID CRYSTALLIZATION ZONE UNDER SUBATMOSPHERIC PRESSURE, AND EVAPORATING WATER FROM SAID CRYSTALLIZATION ZONE, WHILE MAINTAINING A
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |