Patent US3338901A successfully refreshed from Google Patents.
US3338901A
Expired / Lapsed
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Method for producing amorphous quaternary nitrogen compositions
Assignee: PQ Corp
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Filing: 1965-10-21
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Granted: 1967-08-29
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Weldes Helmut Hans Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:30
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
THE METHOD OF PRODUCING AN AMORPHOUS QAUATERNARY NITROGEN COMPOSITION HAVING THE FORMULA:
Claim 2
Independent Claim
12 words
THE METHOD OF PRODUCING AN AMORPHOUS QAUATERNARY NITROGEN COMPOSITION HAVING THE FORMULA:
Claim 3
Independent Claim
49 words
THE METHOD OF PRODUCING N,N,N'',N''-TETRA-(2-HYDROXYETHYL)-PIPERAZINIUM SILICATE WHICH COMPRISES: (A) STARTING WITH THE SODIUM SALT OF THE ABOVE COMPOSITION, (B) LEACHING THE ALKALI METAL ION FROM THE QUATERNARY AMMONIUM SILICATE CRYSTALS WITH AN AQUEOUS LIQUID, AND (C) RECOVERING A SUBSTANTIALLY ALKALI METAL-FREE AMORPHOUS QUATERNARY NITROGEN COMPOSITION OF THE ABOVE FORMULA.
Claim 4
Independent Claim
49 words
THE METHOD OF PRODUCING N,N,N'',N''-TETRA-(2-HYDROXYETHYL)-PIPERAZINIUM SILICATE WHICH COMPRISES: (A) STARTING WITH THE SODIUM SALT OF THE ABOVE COMPOSITION, (B) LEACHING THE ALKALI METAL ION FROM THE QUATERNARY AMMONIUM SILICATE CRYSTALS WITH AN AQUEOUS LIQUID, AND (C) RECOVERING A SUBSTANTIALLY ALKALI METAL-FREE AMORPHOUS QUATERNARY NITROGEN COMPOSITION OF THE ABOVE FORMULA.
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) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |