Patent US2709160A successfully refreshed from Google Patents.
US2709160A
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Amine-coated calcium carbonate pigments
Assignee: Wyandotte Chemicals Corp
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Filing: 1953-06-24
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Granted: 1955-05-24
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Expires: 1973-06-24
Abstract
No abstract record available.
Inventors
- 👤 Korejwa Alfred
- 👤 Lawrence J Reader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:39
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K9/00; C08K9/04; C01; C01P; C01P2004/00; C01P2004/50; C01P2004/60; C01P2004/62; C01P2004/80; C01P2006/00; C01P2006/80; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
AN AMINE-COATED, RUBBER-REINFORCING GRADE, CALCIUM CARBONATE PIGMENT HAVING DISPERSED ON THE SURFACE THEROF FROM ABOUT 0.2% TO ABOUT 5.0% OF A HIGHER AMINE SELECTED FROM THE GROUP CONSISTING OG PRIMARY N-ALKYLAMINES WHOSE ALKYL GROUPS CONTAIN 10-18 CARBON ATOMS AND ROSIN AMINES.
Claim 2
Dependent Claim
41 words
AN AMINE-COATED, RUBBER-REINFORCING GRADE, CALCIUM CARBONATE PIGMENT HAVING DISPERSED ON THE SURFACE THEROF FROM ABOUT 0.2% TO ABOUT 5.0% OF A HIGHER AMINE SELECTED FROM THE GROUP CONSISTING OG PRIMARY N-ALKYLAMINES WHOSE ALKYL GROUPS CONTAIN 10-18 CARBON ATOMS AND ROSIN AMINES.
References Cited (Backward Citations)
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US2296066A
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US2432461A
Cited
US2531396A
Cited
US2578605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |