Patent US2214352A successfully refreshed from Google Patents.
US2214352A
Expired / Lapsed
US
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Process for the production of condensation products containing onium groups
Assignee: GAF Chemicals Corp
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Filing: 1936-06-17
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Granted: 1940-09-10
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Expires: 1956-06-17
Abstract
No abstract record available.
Inventors
- 👤 Schoeller Conrad
- 👤 Ulrich Heinrich
- 👤 Ploetz Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:54
CPC Classifications
A; A01; A01N; A01N31/00; A01N31/08; A01N31/12; A01N57/00; A01N57/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-09-10 | 1944-03-11 | 1944-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-10 | 1948-03-11 | 1948-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-10 | 1952-03-11 | 1952-09-10 | $7700.00 | Window Closed / Lapsed |