Patent US2640800A successfully refreshed from Google Patents.
US2640800A
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Tetraethyl pyrophosphate insecticide
Assignee: California Spray Chemical Corp
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Filing: 1949-09-06
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Granted: 1953-06-02
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Expires: 1969-09-06
Abstract
No abstract record available.
Inventors
- 👤 David L Shatto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:18
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/22; C07F9/24; C07F9/2404; C07F9/2433; C07F9/2445; A; A01; A01N; A01N25/00; A01N25/08; A01N2300/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
AN INSECTICIDAL DUST COMPOSITION COMPRISING TETRAETHYL PYROPHOSPHATE AND ANHYDROUS CALCIUM SULFATE AS A STABILIZER THEREFOR.
Claim 2
Dependent Claim
15 words
AN INSECTICIDAL DUST COMPOSITION COMPRISING TETRAETHYL PYROPHOSPHATE AND ANHYDROUS CALCIUM SULFATE AS A STABILIZER THEREFOR.
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) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |