US2912467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphoranes and method for the preparation thereof
Assignee: F Hoffmann La Roche AG
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Filing: 1958-06-16
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Granted: 1959-11-10
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Expires: 1978-06-16
Abstract
No abstract record available.
Inventors
- 👤 Gerecke Max
- 👤 Ryser Gottlieb
- 👤 Zeller Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:12
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/535; C07F9/5352
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A METHOD FOR THE PRODUCTION OF A COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Independent Claim
12 words
A METHOD FOR THE PRODUCTION OF A COMPOUND REPRESENTED BY THE FORMULA
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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |