US2904586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
alpha-hydroxy-1, 2, 5, 6-tetrahydrobenzylphosphinous acid and preparation thereof
Assignee: Hoechst AG
•
Filing: 1956-05-01
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Granted: 1959-09-15
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Expires: 1976-05-01
Abstract
No abstract record available.
Inventors
- 👤 Ruschig Heinrich
- 👤 Aumuller Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/48; C07F9/4808; C07F9/4816
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF A-HYDROXYL-1,2,5,3-TETRAHYDROBENZYLPHOSPHINOUS ACID AND THE ALKALI METAL SALTS THEREOF.
Claim 2
Dependent Claim
15 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF A-HYDROXYL-1,2,5,3-TETRAHYDROBENZYLPHOSPHINOUS ACID AND THE ALKALI METAL SALTS THEREOF.
References Cited (Backward Citations)
GB453437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |