US2997459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic synthetic materials of
Assignee: —
•
Filing: —
•
Granted: 1961-08-22
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Expires: 1978-08-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:13
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08G; C08G64/00; C08G64/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A LINEAR, HIGH MOLECULAR WEIGHT, THERMOPLASTIC, FIBER-FORMING AND FILM-FORMING POLYCARBONATE RESIN ORIENTABLE BY STRETCHING CONSISTING ESSENTIALLY OF A CHAIN OF DIVALENT AROMATIC RADICALS MIXED WITH DIVALENT NON-AROMATIC RADICALS IN A RATIO OF ABOUT 95:5 MOLS TO ABOUT 50:50 MOLS, SAID AROMATIC AND NON-AROMATIC RADICALS BEING LINEARLY CONNECTED, ONE TO THE NEXT, BY THE CARBONATE ESTER BRIDGE
Claim 2
Dependent Claim
56 words
A LINEAR, HIGH MOLECULAR WEIGHT, THERMOPLASTIC, FIBER-FORMING AND FILM-FORMING POLYCARBONATE RESIN ORIENTABLE BY STRETCHING CONSISTING ESSENTIALLY OF A CHAIN OF DIVALENT AROMATIC RADICALS MIXED WITH DIVALENT NON-AROMATIC RADICALS IN A RATIO OF ABOUT 95:5 MOLS TO ABOUT 50:50 MOLS, SAID AROMATIC AND NON-AROMATIC RADICALS BEING LINEARLY CONNECTED, ONE TO THE NEXT, BY THE CARBONATE ESTER BRIDGE
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |