US3676393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters stabilized by phosphorus compounds
Assignee: Goodyear Tire and Rubber Co
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Filing: 1968-10-14
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Granted: 1972-07-11
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Expires: 1988-10-14
Abstract
Abstract The invention concerns stabilization of polyester resins by incorporating in the resins certain types of phosphorous compounds. The application particularly relates to the process of stabilizing and to the stabilized compositions.
Inventors
- 👤 Aleksander Piirma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A stabilized composition comprising a highly polymeric condensation polyester resin derived from a glycol and a dicarboxylic acid containing a stabilizing amount of dibutyl butylphosphonate.
Claim 2
Dependent Claim
26 words
A stabilized composition comprising a highly polymeric condensation polyester resin derived from a glycol and a dicarboxylic acid containing a stabilizing amount of butyl phenyl butylphosphonate.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |