US2691663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of substituted pentanediols
Assignee: Shell Development Co
•
Filing: 1951-10-29
•
Granted: 1954-10-12
•
Expires: 1971-10-29
Abstract
No abstract record available.
Inventors
- 👤 Curtis W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:29
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
AN ESTER OF (1) 1,5-PENTANEDIOL WHEREIN A CHAIN CARBON ATOM IMMEDIATELY ADJACENT TO ONE OF THE TERMINAL HYDROXYL-BEARING CARBON ATOMS IS JOINED TO AN ALKYL GROUP CONTAINING FROM 1 TO 8 CARBON ATOMS, AND THE CHAIN CARBON ATOM ADJACENT TO THE OTHER TERMINAL HYDROXYL-BEARING CARBON ATOM IS JOINED TO AN ALKYL GROUP CONTAINING FROM 1 TO 8 CARBON ATOMS AND TO A CH2OR GROUP WHEREIN R IS A HYDROCARBON RADICAL CONTAINING FROM 1 TO 10 CARBON ATOMS, AND (2) AN ACID COMPONENT OF THE GROUP CONSISTING OF MONCARBOXYLIC HYDROCARBON ACIDS CONTAINING FROM 1 TO 10 CARBON ATOMS, POLYCARBOXYLIC HYDROCARBON ACIDS CONTAINING FROM 2 TO 10 CARBON ATOMS, AND ACID ESTERS OF POLYCARBOXYLIC HYDROCARBON ACIDS CONTAINING FROM 2 TO 10 CARBON ATOMS WITH ALIPHATIC HYDROCARBON MONOHYDRIC ALCOHOLS CONTAINING FROM 1 TO 8 CARBON ATOMS.
Claim 2
Dependent Claim
133 words
AN ESTER OF (1) 1,5-PENTANEDIOL WHEREIN A CHAIN CARBON ATOM IMMEDIATELY ADJACENT TO ONE OF THE TERMINAL HYDROXYL-BEARING CARBON ATOMS IS JOINED TO AN ALKYL GROUP CONTAINING FROM 1 TO 8 CARBON ATOMS, AND THE CHAIN CARBON ATOM ADJACENT TO THE OTHER TERMINAL HYDROXYL-BEARING CARBON ATOM IS JOINED TO AN ALKYL GROUP CONTAINING FROM 1 TO 8 CARBON ATOMS AND TO A CH2OR GROUP WHEREIN R IS A HYDROCARBON RADICAL CONTAINING FROM 1 TO 10 CARBON ATOMS, AND (2) AN ACID COMPONENT OF THE GROUP CONSISTING OF MONCARBOXYLIC HYDROCARBON ACIDS CONTAINING FROM 1 TO 10 CARBON ATOMS, POLYCARBOXYLIC HYDROCARBON ACIDS CONTAINING FROM 2 TO 10 CARBON ATOMS, AND ACID ESTERS OF POLYCARBOXYLIC HYDROCARBON ACIDS CONTAINING FROM 2 TO 10 CARBON ATOMS WITH ALIPHATIC HYDROCARBON MONOHYDRIC ALCOHOLS CONTAINING FROM 1 TO 8 CARBON ATOMS.
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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) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |