Patent US2745877A successfully refreshed from Google Patents.
US2745877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary phosphonium compounds
Assignee: Novartis AG
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Filing: 1952-07-02
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Granted: 1956-05-15
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Expires: 1972-07-02
Abstract
No abstract record available.
Inventors
- 👤 Bindler Jakob
- 👤 Model Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:14
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5407
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
AN ORGANIC QUATERNARY PHOSPHONIUM COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
9 words
AN ORGANIC QUATERNARY PHOSPHONIUM COMPOUND OF THE GENERAL 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) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |