US2647098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyester plasticizers
Assignee: Bridgestone Firestone Inc
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Filing: 1951-11-08
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Granted: 1953-07-28
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Expires: 1971-11-08
Abstract
No abstract record available.
Inventors
- 👤 Jr William Mayo Smith
- 👤 Robert J Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:57
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L67/00; C08L67/02; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5197
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
PROCESS WHICH COMPRISES CONTACTING, WITH CALCIUM OXIDE, AT TEMPERATURES FROM 150* TO 250* C., AND FOR A TIME OF AT LEAST 15 MINUTES, A MIXTURE OF LINEAR POLYESTERS PRODUCED BY ESTERIFYING TOGETHER
Claim 2
Dependent Claim
32 words
PROCESS WHICH COMPRISES CONTACTING, WITH CALCIUM OXIDE, AT TEMPERATURES FROM 150* TO 250* C., AND FOR A TIME OF AT LEAST 15 MINUTES, A MIXTURE OF LINEAR POLYESTERS PRODUCED BY ESTERIFYING TOGETHER
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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |