US2818406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonic diamides
Assignee: Phillips Petroleum Co
•
Filing: 1954-04-26
•
Granted: 1957-12-31
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 James N Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:54
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/44; C07F9/4403; C07F9/4411
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A PHOSPHONIC DIAMIDE REPRESENTED BY THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
8 words
A PHOSPHONIC DIAMIDE REPRESENTED BY THE STRUCTURAL FORMULA
References Cited (Backward Citations)
US2486657A
Cited
US2666750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |