US2723261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-melting polymers of para-tertbutylstyrene
Assignee: California Research LLC
•
Filing: 1951-12-22
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Granted: 1955-11-08
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Expires: 1971-12-22
Abstract
No abstract record available.
Inventors
- 👤 Irving E Levine
- 👤 William E Elwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:45
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/12; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
AS A NEW TERMOPLASTIC MATERIAL, POLYMERIC PARATERT-BUTYLSTYRENE HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 50,000 AND CHARACTERIZED BY HEAT DISTORTION TEMPERATURES IN THE RANGE FROM 120 TO 130* C.
Claim 2
Dependent Claim
29 words
AS A NEW TERMOPLASTIC MATERIAL, POLYMERIC PARATERT-BUTYLSTYRENE HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 50,000 AND CHARACTERIZED BY HEAT DISTORTION TEMPERATURES IN THE RANGE FROM 120 TO 130* C.
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) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |