US2730531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amides of epoxyamines
Assignee: Shell Development Co
•
Filing: 1953-03-03
•
Granted: 1956-01-10
•
Expires: 1973-03-03
Abstract
No abstract record available.
Inventors
- 👤 George B Payne
- 👤 Curtis W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:22
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
AN N-EPOXYALKYL AMIDE OF A POLYCARBOXYLIC ACID HAVING FIVE TO THIRTY-SIX CARBON ATOMS IN THE AMIDE MOLECULE AND COMPOSED OF CARBON, HYDROGEN CARBONLY AND EPOXY OXYGEN, AND AMIDO NITROGEN ATOMS, SAID EPOXY OXYGEN BEING LINKED TO ADJACENT CARBON ATOMS.
Claim 2
Dependent Claim
39 words
AN N-EPOXYALKYL AMIDE OF A POLYCARBOXYLIC ACID HAVING FIVE TO THIRTY-SIX CARBON ATOMS IN THE AMIDE MOLECULE AND COMPOSED OF CARBON, HYDROGEN CARBONLY AND EPOXY OXYGEN, AND AMIDO NITROGEN ATOMS, SAID EPOXY OXYGEN BEING LINKED TO ADJACENT CARBON ATOMS.
References Cited (Backward Citations)
US2131120A
Cited
US2469683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |