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Patent US2870190A successfully refreshed from Google Patents.
US2870190A
Expired / Lapsed
US
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Phosphonate compounds
Assignee: Dow Chemical Co
•
Filing: 1957-07-03
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Granted: 1959-01-20
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Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 Bill E Burgert
- 👤 Tolkmith Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:51
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
8 words
A PHOSPHONATE COMPOUND CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
8 words
A PHOSPHONATE COMPOUND CORRESPONDING TO THE GENERAL FORMULA
Claim 3
Independent Claim
11 words
A METHOD OF PREPARING A COMPOUND CORRESPONDING TO THE GENERAL FORMULA
Claim 4
Independent Claim
11 words
A METHOD OF PREPARING A COMPOUND CORRESPONDING TO THE GENERAL 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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |