US2668839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O-(2, 4, 5-trichlorophenyl) n, n-diethylamidoalkanephosphonates
Assignee: Dow Chemical Co
•
Filing: 1953-04-21
•
Granted: 1954-02-09
•
Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 Tolkmith Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:06
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/44; C07F9/4434; C07F9/4449
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
AN O-(2,4,5-TRICHLOROPHENYL) N,N-DIETHYLAMIDOALKANEPHOSPHONATE OF THE FORMULA
Claim 2
Dependent Claim
6 words
AN O-(2,4,5-TRICHLOROPHENYL) N,N-DIETHYLAMIDOALKANEPHOSPHONATE OF THE 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) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |