Patent US2513133A successfully refreshed from Google Patents.
US2513133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saturated dihydric alcohols and process for the preparation thereof
Assignee: Shell Development Co
•
Filing: 1947-02-24
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Granted: 1950-06-27
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Expires: 1967-02-24
Abstract
No abstract record available.
Inventors
- 👤 Lewis F Hatch
- 👤 Theodore W Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:57
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/02; C07D309/08; C07D309/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
AS A NEW CHEMICAL COMPOUND, 4-HYDROXY-3HYDROXYMETHYLTETRAHYDROPYRAN.
Claim 2
Dependent Claim
6 words
AS A NEW CHEMICAL COMPOUND, 4-HYDROXY-3HYDROXYMETHYLTETRAHYDROPYRAN.
References Cited (Backward Citations)
US2134430A
Cited
US2368186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |