US2994675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamine stabilizers for polymerized alpha-olefins
Assignee: Shell USA Inc
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Filing: 1956-10-26
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Granted: 1961-08-01
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Expires: 1976-10-26
Abstract
No abstract record available.
Inventors
- 👤 Robert N Haward
- 👤 Thomas H Boultbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A NORMALLY SOLID POLYMERIC COMPOSITION COMPRISING A POLYMER OF A MONOALPHA-OLEFIN OF 2-3 CARBON ATOMS AND FROM ABOUT 0.02% TO ABOUT 5% OF A FATTY ACID SALT OF A MONOMERIC ALIPHATIC POLYAMINE, SAID FATTY ACID BEING A CARBOXYLIC ACID HAVING MORE THAN 7 CARBON ATOMS, THE SAID POLYMER CONTAINING TITANIUM AND ALUMINUM RESIDUES.
Claim 2
Dependent Claim
53 words
A NORMALLY SOLID POLYMERIC COMPOSITION COMPRISING A POLYMER OF A MONOALPHA-OLEFIN OF 2-3 CARBON ATOMS AND FROM ABOUT 0.02% TO ABOUT 5% OF A FATTY ACID SALT OF A MONOMERIC ALIPHATIC POLYAMINE, SAID FATTY ACID BEING A CARBOXYLIC ACID HAVING MORE THAN 7 CARBON ATOMS, THE SAID POLYMER CONTAINING TITANIUM AND ALUMINUM RESIDUES.
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |