US3069287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating polycarbonate plastics
Assignee: Bayer Corp
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Filing: 1961-02-16
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Granted: 1962-12-18
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Expires: 1981-02-16
Abstract
No abstract record available.
Inventors
- 👤 George A Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:42
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/14; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J2369/00; C08J2475/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF COATING POLYCARBONATE PLASTICS WITH A LAYER OF POLYURETHANE PLASTIC WHICH COMPRISES EXPOSING A CORE ELEMENT OF A POLYCARBONATE PLASTIC PREPARED BY THE PROCESS WHICH COMPRISES REACTING A DI-(MONOHYDROXY)ARYL)-ALKANE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF CARBONIC ACIC DIESTERS, PHOSGENE AND BISCHLOROCARBONIC ACID ESTER OF DI-(MONOHYDROXYRYL)ALKANES TO AN ALKALI METAL DICHROMATE IN SULFURIC ACID, AND APPLYING TO SAID CORE ELEMENT A POLYURETHANE PLASTIC PREPARED BY REACTING AN ORGANIC POLYISOCYANATE WITH AN ORGANIC COMPOUND CONTAINING ACTIVE HYDROGEN CONTAINING GROUPS AND SELECTED FROM THE GROUP CONSISTING OF HYDROXYL POLYESTERS PREPARED BY THE PROCESS WHICH COMPRISES REACTING A POLYHYDRIC ALCOHOL WITH A POLYCARBOXYLIC ACID AND POLYHYDRIC POLYALKYLENE ETHERS.
Claim 2
Independent Claim
109 words
A METHOD OF COATING POLYCARBONATE PLASTICS WITH A LAYER OF POLYURETHANE PLASTIC WHICH COMPRISES EXPOSING A CORE ELEMENT OF A POLYCARBONATE PLASTIC PREPARED BY THE PROCESS WHICH COMPRISES REACTING A DI-(MONOHYDROXY)ARYL)-ALKANE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF CARBONIC ACIC DIESTERS, PHOSGENE AND BISCHLOROCARBONIC ACID ESTER OF DI-(MONOHYDROXYRYL)ALKANES TO AN ALKALI METAL DICHROMATE IN SULFURIC ACID, AND APPLYING TO SAID CORE ELEMENT A POLYURETHANE PLASTIC PREPARED BY REACTING AN ORGANIC POLYISOCYANATE WITH AN ORGANIC COMPOUND CONTAINING ACTIVE HYDROGEN CONTAINING GROUPS AND SELECTED FROM THE GROUP CONSISTING OF HYDROXYL POLYESTERS PREPARED BY THE PROCESS WHICH COMPRISES REACTING A POLYHYDRIC ALCOHOL WITH A POLYCARBOXYLIC ACID AND POLYHYDRIC POLYALKYLENE ETHERS.
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) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |