Patent US2807639A successfully refreshed from Google Patents.
US2807639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-halo-4, 6-ditertiaryalkyl phenol esters
Assignee: Dow Chemical Co
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Filing: 1955-05-11
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Granted: 1957-09-24
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Expires: 1975-05-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Rickert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:52
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/62; C07C69/63
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
AN ESTER COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
6 words
AN ESTER COMPOUND OF THE 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) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |