US3206496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary phosphorus compounds and method of preparing same
Assignee: Wyeth Holdings LLC
•
Filing: 1960-09-06
•
Granted: 1965-09-14
•
Expires: 1980-09-06
Abstract
No abstract record available.
Inventors
- 👤 Michael M Rauhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:20
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/16; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5449; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A 1,1,4,4 - TETRA-SUBSTITUTED-1,4-DISPHOSPHONIACYCLOHEXANE SALT OF THE FORMULA
Claim 2
Dependent Claim
8 words
A 1,1,4,4 - TETRA-SUBSTITUTED-1,4-DISPHOSPHONIACYCLOHEXANE SALT OF THE FORMULA
References Cited (Backward Citations)
GB673451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |