US3155756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding of stress-free polycarbonate articles
Assignee: Bayer AG
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Filing: 1961-03-06
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Granted: 1964-11-03
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Expires: 1981-03-06
Abstract
No abstract record available.
Inventors
- 👤 Hechelhammer Wilhelm
- 👤 Streib Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:40
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/08; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/90; B29C48/91; B29C48/919; B29C71/00; B29C71/02; B29C2071/022; B29C48/001; B29C48/0022; B29C48/09; B29C48/10; B29C48/904; B29K; B29K2069/00; B29L; B29L2023/00; B29L2023/22; C08J2369/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A METHOD FOR MAKING A SUBSTANTIALLY STRESS-FREE SHAPED ARTICLE COMPRISING A THERMOPLASTIC POLYCARBONATE WHICH COMPRISES BOTH SHAPING THE POLYCARBONATE AND IMMEDIATELY POST TREATING IT WHILE SUBJECTING TO A TEMPERATURE OF FROM ABOUT 70*C. TO ABOUT 120*C. UNTIL THE POLYCARBONATE IS COMPLETELY SOLIDIFIED.
Claim 2
Independent Claim
42 words
A METHOD FOR MAKING A SUBSTANTIALLY STRESS-FREE SHAPED ARTICLE COMPRISING A THERMOPLASTIC POLYCARBONATE WHICH COMPRISES BOTH SHAPING THE POLYCARBONATE AND IMMEDIATELY POST TREATING IT WHILE SUBJECTING TO A TEMPERATURE OF FROM ABOUT 70*C. TO ABOUT 120*C. UNTIL THE POLYCARBONATE IS COMPLETELY SOLIDIFIED.
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |