US3121704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric product and method of producing same
Assignee: General Dynamics Corp
•
Filing: 1960-06-20
•
Granted: 1964-02-18
•
Expires: 1980-06-20
Abstract
No abstract record available.
Inventors
- 👤 Rip G Rice
- 👤 Buell H Geib
- 👤 Lloyd A Kaplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:22
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A POLYMERIC PRODUCT OF HIGH HEAT STABILITY WHICH CONSISTS ESSENTIALLY OF THE REACTION PRODUCT OF (1) A CONDENSATION PRODUCT IN THE FORM OF A POLYMERIC CHAIN CONTAINING AT LEAST TWO CYCLIC PN-CONTAINING RINGS, EACH PAIR OF SUCH ADJACENT RINGS BEING LINKED TOGETHER BY A LEAST ONE AROMATIC DIOXY RADICAL, SAID CONDENSATION PRODUCT ALSO CONTAINING AROMATIC OXY RADICALS CONTAINING FREE HYDROXYL GROUPS, SAID CONDENSATION PRODUCT PRODUCED BY REACTION OF A CYCLIC PHOSPHONITRILIC CHLORIDE AND A POLYHYDROXY AROMATIC COMPOUND IN THE PRESENCE OF A TERTIARY AMINE, AND (2) NEXAMETHYLENETETRAMINE.
Claim 2
Dependent Claim
87 words
A POLYMERIC PRODUCT OF HIGH HEAT STABILITY WHICH CONSISTS ESSENTIALLY OF THE REACTION PRODUCT OF (1) A CONDENSATION PRODUCT IN THE FORM OF A POLYMERIC CHAIN CONTAINING AT LEAST TWO CYCLIC PN-CONTAINING RINGS, EACH PAIR OF SUCH ADJACENT RINGS BEING LINKED TOGETHER BY A LEAST ONE AROMATIC DIOXY RADICAL, SAID CONDENSATION PRODUCT ALSO CONTAINING AROMATIC OXY RADICALS CONTAINING FREE HYDROXYL GROUPS, SAID CONDENSATION PRODUCT PRODUCED BY REACTION OF A CYCLIC PHOSPHONITRILIC CHLORIDE AND A POLYHYDROXY AROMATIC COMPOUND IN THE PRESENCE OF A TERTIARY AMINE, AND (2) NEXAMETHYLENETETRAMINE.
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) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |