Patent US2857305A successfully refreshed from Google Patents.
US2857305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonate esters
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-12-30
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Granted: 1958-10-21
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Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
- 👤 Gail H Birum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:41
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
18 words
A MITICIDAL COMPOSITION COMPRISING AN INERT CARRIER AND A TOXIC QUANTITY OF A PHOSPHATE ESTER OF THE FORMULA
Claim 2
Dependent Claim
18 words
A MITICIDAL COMPOSITION COMPRISING AN INERT CARRIER AND A TOXIC QUANTITY OF A PHOSPHATE ESTER OF THE FORMULA
Claim 3
Independent Claim
20 words
THE METHOD OF KILLING MITES WHICH COMPRISES EXPOSING SAID MITES TO A TOXIC QUANTITY OF PHOSPHONATE ESTER OF THE FORMULA
Claim 4
Independent Claim
20 words
THE METHOD OF KILLING MITES WHICH COMPRISES EXPOSING SAID MITES TO A TOXIC QUANTITY OF PHOSPHONATE ESTER OF THE 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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |