US3258492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
P-chloro or hydroxy benzyl tertiary phosphine oxides
Assignee: Melpar Inc
•
Filing: 1965-07-22
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Granted: 1966-06-28
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Expires: 1985-07-22
Abstract
No abstract record available.
Inventors
- 👤 Paul E Ritt
- 👤 Lee M Kindley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:54
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/304; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5333
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
AS A NEW COMPOSITION OF MATTER, P-CHLOROBENZYL DIMETHYLPHOSPHINE OXIDE HAVING THE FORMULA.
Claim 2
Dependent Claim
12 words
AS A NEW COMPOSITION OF MATTER, P-CHLOROBENZYL DIMETHYLPHOSPHINE OXIDE HAVING 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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |