Patent US2898740A successfully refreshed from Google Patents.
US2873293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis(alpha-chloro-isobutyrates) of dihydroxy-benzenes
Assignee: Dow Chemical Co
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Filing: 1956-08-06
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Granted: 1959-02-10
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Expires: 1976-08-06
Abstract
No abstract record available.
Inventors
- 👤 Donald G Kundiger
- 👤 Elwin B W Ovist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:56
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/62; C07C69/63; C07C67/00; C07C67/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
BIS(A-CHLORO-ISOBUTYRATES) OF DIHYDROXY-BENZENES HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
BIS(A-CHLORO-ISOBUTYRATES) OF DIHYDROXY-BENZENES 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) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |