US2648706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amides of alkane phosphonic acids
Assignee: California Research LLC
•
Filing: 1950-09-29
•
Granted: 1953-08-11
•
Expires: 1970-09-29
Abstract
No abstract record available.
Inventors
- 👤 Allen H Lewis
- 👤 Richard D Stayner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:40
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/44; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
AS NEW WETTING AGENTS, DIAMIDES OF ALKANE PHOSPHONIC ACIDS, HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
13 words
AS NEW WETTING AGENTS, DIAMIDES OF ALKANE PHOSPHONIC ACIDS, HAVING THE STRUCTURAL 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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |