US2552540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O-methoxy o-alkyl amidothiophosphates
Assignee: Dow Chemical Co
•
Filing: 1949-04-15
•
Granted: 1951-05-15
•
Expires: 1969-04-15
Abstract
No abstract record available.
Inventors
- 👤 Lewis R Drake
- 👤 Arthur J Erbel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:57
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/22; C07F9/24; C07F9/2404; C07F9/242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
AN O-(METHOXYPHENYL) O-ALKYL AMIDOTHIOPHOSPHATE HAVING THE FORMULA
Claim 2
Dependent Claim
7 words
AN O-(METHOXYPHENYL) O-ALKYL AMIDOTHIOPHOSPHATE HAVING THE FORMULA
References Cited (Backward Citations)
US2299535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |