US3027296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated phosphorus esters
Assignee: Shell USA Inc
•
Filing: 1956-05-28
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Granted: 1962-03-27
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Richard R Whetstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:56
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C07F9/16; C07F9/165; C07F9/1651
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
14 words
AS NEW COMPOSITIONS OF MATTER, ESTERS OF ACIDS OF PENTAVALENT PHOSPHORUS OF THE FORMULA:
References Cited (Backward Citations)
US2573568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |