US3787486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of haloethane phosphonic acids
Assignee: GAF Corp
•
Filing: 1969-10-17
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Granted: 1974-01-22
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Expires: 1989-10-17
Abstract
Abstract 2-HALOETHYLPHSOPHONIC ACIDS OF THE FORMULA: WHEREIN X IS AS ABOVE AND R1 AND R2 ARE HALOALKYL, ALKYL OR HYDROXYALKYL, BY TREATMENT WITH 20-45% AQUEOUS HYDROCHLORIC ACID UNDER AUTOGENOUS OR GREATER PRESSURE AT A TEMPERATURE OF ABOUT 100-145*C. X-CH2-CH2-P(=O)(-O-R1)(-O-R2) WHEREIN X IS CHLORINE OR BROMINE, USEFUL AS PLANT GROWTH STIMULANTS, ARE PREPARED BY HYDROLYSIS OF A COMPOUND OF THE FORMULA: X-CH2-CH2-P(=O)(-OH)2
Inventors
- 👤 D Randall
- 👤 C Vogel
- 👤 R Wynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:20
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |