US2779800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of poly-(hydroxyaryl) alkane compounds and new products thereof
Assignee: Shell Development Co
•
Filing: 1954-11-30
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Granted: 1957-01-29
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Expires: 1974-11-30
Abstract
No abstract record available.
Inventors
- 👤 Roy T Holm
- 👤 Curtis W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:32
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/16; C07C37/115; C07C37/20; C07C39/00; C07C39/12; C07C39/15; C07C39/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A TETRA-(HYDROXYARYL)-HYDROXY-ALIPHATIC SATURATED HYDROCARBON HAVING THE HYDROXYL GROUP LINKED TO A CARBON ATOM OF THE ALKANE CHAIN WHICH IS IN AN INTERMEDIATE POSITIN BETWEN TWO GEM-DI(HYDROXYARYL)-SUBSTITUTED CARBON ATOMS OF THE CHAIN WHICH ARE SEPARATED BY AT LEAST FOUR CARBON ATOMS.
Claim 2
Dependent Claim
40 words
A TETRA-(HYDROXYARYL)-HYDROXY-ALIPHATIC SATURATED HYDROCARBON HAVING THE HYDROXYL GROUP LINKED TO A CARBON ATOM OF THE ALKANE CHAIN WHICH IS IN AN INTERMEDIATE POSITIN BETWEN TWO GEM-DI(HYDROXYARYL)-SUBSTITUTED CARBON ATOMS OF THE CHAIN WHICH ARE SEPARATED BY AT LEAST FOUR CARBON ATOMS.
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |