US2913436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus-containing polyesters and method for their production
Assignee: Individual
•
Filing: 1953-11-18
•
Granted: 1959-11-17
•
Expires: 1973-11-18
Abstract
No abstract record available.
Inventors
- 👤 Wilson A Reeves
- 👤 John D Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:44
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/04; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C08G63/68; C08G63/692; C08G63/6924; C08G63/78; C08G63/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A FLAME-RESISTANT POLYMER CONSISTING ESSENTIALLY OF A POLYESTER OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF A POLYCARBOXYLIC ACID AND AT LEAST ONE POLYHYDRIC PHOSPHORUS COMPOUND FROM THE GROUP CONSISTING OF TETRAKSIS(HYDROXYMETHYL) PHOSPHONIUM CHLORIDE, TRIS (HYDROXYMETHYL) PHOSPHINE OXIDE, AND PHOSPHORUS-LINKED METHYLOL GROUP CONTAINING DERIVATIVES THEREOF, SAID DERIVATIVES CONTAINING, AS THE SOLE SUBSTITUENTS REACTIVE WITH SAID POLYCARBOXYLIC ACID, AT LEAST TWO$PCH2OH GROUPS AND HAVING BEEN PRODUCED BY HEATING, AT A TEMPERATAURE FROM ABOUT ROOM TEMPERATURE TO ABOUT 150* C., A MIXTURE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF TETRAKIS(HYDROXYMETHYL) PHOSPHONIUM CHLORIDE, TRIS(HYDROXYMETHYL) PHOSPHINE OXIDE, AND MIXTURES THEREOF, WITH A COMPOUND CONTAINING AT LEAST TWO MEMBERS OF THE GROUP CONSISTING OF HYDROGEN AND -CH2OH RADICALS ATTACHED TO A TRIVALENT NITROGEN ATOM.
Claim 2
Dependent Claim
118 words
A FLAME-RESISTANT POLYMER CONSISTING ESSENTIALLY OF A POLYESTER OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF A POLYCARBOXYLIC ACID AND AT LEAST ONE POLYHYDRIC PHOSPHORUS COMPOUND FROM THE GROUP CONSISTING OF TETRAKSIS(HYDROXYMETHYL) PHOSPHONIUM CHLORIDE, TRIS (HYDROXYMETHYL) PHOSPHINE OXIDE, AND PHOSPHORUS-LINKED METHYLOL GROUP CONTAINING DERIVATIVES THEREOF, SAID DERIVATIVES CONTAINING, AS THE SOLE SUBSTITUENTS REACTIVE WITH SAID POLYCARBOXYLIC ACID, AT LEAST TWO$PCH2OH GROUPS AND HAVING BEEN PRODUCED BY HEATING, AT A TEMPERATAURE FROM ABOUT ROOM TEMPERATURE TO ABOUT 150* C., A MIXTURE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF TETRAKIS(HYDROXYMETHYL) PHOSPHONIUM CHLORIDE, TRIS(HYDROXYMETHYL) PHOSPHINE OXIDE, AND MIXTURES THEREOF, WITH A COMPOUND CONTAINING AT LEAST TWO MEMBERS OF THE GROUP CONSISTING OF HYDROGEN AND -CH2OH RADICALS ATTACHED TO A TRIVALENT NITROGEN ATOM.
References Cited (Backward Citations)
US2646420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |