US2770665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process for preparing propylene tetramer
Assignee: Gulf Oil Corp
•
Filing: 1952-09-12
•
Granted: 1956-11-13
•
Expires: 1972-09-12
Abstract
No abstract record available.
Inventors
- 👤 Lawrence H Corn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:47
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; C07C2521/00; C07C2521/06; C07C2521/08; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF BONDING A POLYAMIDE LAYER TO A POLYVINYL CHLORIDE LAYER WHICH COMPRISES DEPOSITING ON THE POLYVINYL CHLORIDE LAYER A FIRST INTERMEDIATE LAYER OF A SOLUTION OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF A POLYACRYLIC ACID ESTER AND A POLYMETHACRYLIC ACID ESTER, DEPOSITING ON SAID FIRST INTERMEDIATE LAYER A SECOND INTERMEDIATE LAYER OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF NITROCELLULOSE AND POLYVINYL ACETATE, AND DEPOSITING ON SAID SECOND INTERMEDIATE LAYER THE POLYAMIDE LAYER.
Claim 2
Independent Claim
78 words
THE METHOD OF BONDING A POLYAMIDE LAYER TO A POLYVINYL CHLORIDE LAYER WHICH COMPRISES DEPOSITING ON THE POLYVINYL CHLORIDE LAYER A FIRST INTERMEDIATE LAYER OF A SOLUTION OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF A POLYACRYLIC ACID ESTER AND A POLYMETHACRYLIC ACID ESTER, DEPOSITING ON SAID FIRST INTERMEDIATE LAYER A SECOND INTERMEDIATE LAYER OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF NITROCELLULOSE AND POLYVINYL ACETATE, AND DEPOSITING ON SAID SECOND INTERMEDIATE LAYER THE POLYAMIDE LAYER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |