Patent US3436172A successfully refreshed from Google Patents.
US3436172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making hydrazinium diperchlorate
Assignee: ATK Launch Systems LLC
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Filing: 1962-04-03
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Granted: 1969-04-01
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Expires: 1982-04-03
Abstract
No abstract record available.
Inventors
- 👤 John E Paustian
- 👤 Marvin M Fein
- 👤 Murray S Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:06
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
THE METHOD OF MODIFYING THE FORM OF IRREGULAR CRYSTALS OF ANHYDROUS HYDRAZINIUM DIPERCHLORATE TO MAKE THE CRYSTALS MORE REGULAR WHICH COMPRISES CONTACTING SAID CRYSTALS WITH AQUEOUS PERCHLORIC ACID OF A CONCENTRATION OF AT LEAST 70 PERCENT BY WEIGHT.
Claim 2
Independent Claim
38 words
THE METHOD OF MODIFYING THE FORM OF IRREGULAR CRYSTALS OF ANHYDROUS HYDRAZINIUM DIPERCHLORATE TO MAKE THE CRYSTALS MORE REGULAR WHICH COMPRISES CONTACTING SAID CRYSTALS WITH AQUEOUS PERCHLORIC ACID OF A CONCENTRATION OF AT LEAST 70 PERCENT BY WEIGHT.
References Cited (Backward Citations)
US3131997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |