US3287316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of filaments or films by shaping linear polycarbonates of high molecular weight
Assignee: Bayer AG
•
Filing: 1964-03-31
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Granted: 1966-11-22
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Expires: 1984-03-31
Abstract
No abstract record available.
Inventors
- 👤 Falkai Bela Von
- 👤 Prietzschk Artur
- 👤 Rellensmann Wolfgang
- 👤 Reichle Alfred
- 👤 Wieden Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:43
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D01F6/64; C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/109; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
IN THE PROCESS OF PRODUCING SHAPED ARTICLES BY SHAPING A LINEAR POLYCARBONATE OF DI-(HYDROXY PHENYL)-2,2PROPANE FROM ITS SOLUTION, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID POLYCARBONATE SOLUTION PRIOR TO THE SHAPING THEREOF AN ORGANIC CARBONATE OF THE FORMULA
Claim 2
Dependent Claim
38 words
IN THE PROCESS OF PRODUCING SHAPED ARTICLES BY SHAPING A LINEAR POLYCARBONATE OF DI-(HYDROXY PHENYL)-2,2PROPANE FROM ITS SOLUTION, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID POLYCARBONATE SOLUTION PRIOR TO THE SHAPING THEREOF AN ORGANIC CARBONATE OF THE FORMULA
References Cited (Backward Citations)
US3021340A
Cited
GB828523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |