US2548704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted 2,3-dihydro-2-methylbenzofurans
Assignee: Dow Chemical Co
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Filing: 1949-08-17
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Granted: 1951-04-10
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Expires: 1969-08-17
Abstract
No abstract record available.
Inventors
- 👤 Gerald H Coleman
- 👤 Raymond H Rigterink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:11
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/79; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A SUBSTITUTED 2,3-DIHYDRO-2-METHYLBENZOFURAN HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A SUBSTITUTED 2,3-DIHYDRO-2-METHYLBENZOFURAN HAVING THE FORMULA
References Cited (Backward Citations)
DE279864C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |