US2971019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organo-phosphorus compounds
Assignee: Uniroyal Inc
•
Filing: 1953-03-17
•
Granted: 1961-02-07
•
Expires: 1973-03-17
Abstract
No abstract record available.
Inventors
- 👤 Elbert C Ladd
- 👤 Merlin P Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/30; C07F9/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
KETOPHOSPHONATES HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2478390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |