US3686141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclizing of polymer
Assignee: Total Petrochemicals and Refining USA Inc
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Filing: 1970-06-23
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Granted: 1972-08-22
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Expires: 1990-06-23
Abstract
Abstract NEW HEAT HETEROCYCLIZED POLYBUTADIYNYLENES OF THE FORMULA (X<(-C(-)=CH-CH=C(-R(-))-))N WHERE R IS ORGANIC AND X IS A HETEROCYCLIZING RADICAL OF THE ELEMENTS SULPHUR, SELENIUM, TELLURIUM, ANTIMONY, ARSENIC, BISMUTH, OXYGEN, PHOSPHORUS, BORON, AND NITROGEN AND WHICH ARE FORMED BY REACTING POLYMERS CONTAINING BUTADIYNYLENE GROUPS WITH A HETEROCYCLIZING COMPOUND OF THESE ELEMENTS HAVING GEMINAL ATOMS, AND THIS METHOD OF MAKING SAID POLYMERS.
Inventors
- 👤 William J I Bracke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:33
CPC Classifications
C; C08; C08G; C08G79/00; C08G65/00; C08G65/002; C08G65/005; C08G65/007; C08G73/00; C08G73/06; C08G73/0605; C08G73/0611; C08G75/00; C08G75/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |