US3333034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting process
Assignee: Polymer Corp
•
Filing: 1965-11-10
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Granted: 1967-07-25
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Expires: 1985-11-10
Abstract
No abstract record available.
Inventors
- 👤 Louis P Muller
- 👤 Jr John W Benz
- 👤 Paul R Schaeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:32
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/003; B29C39/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD FOR CASTING SHAPED POLYLACTAM ARTICLES BY FORMING SUCH ARTICLE DURING THE LOW TEMPERATURE ANIONIC POLYMERIZATION OF A HIGHER LACTAM COMPRISING THE STEPS OF FILLING THE MOLD WITH A VOLATILE ORGANIC MATERIAL THAT IS SOLUBLE IN SAID LACTAM, VOLATILIZING SAID ORGANIC MATERIAL TO DISPLACE THE LESS SOLUBLE GASES PRESENT, CHARGING SAID MOLD WITH SAID LACTAM, AND POLYMERIZING THE LACTAM IN SAID MOLD AT SUBSTANTIALLY ATMOSPHERIC PRESSURES AND BELOW THE MELTING POINT OF THE POLYMERIZED POLYLACTAM.
Claim 2
Independent Claim
76 words
A METHOD FOR CASTING SHAPED POLYLACTAM ARTICLES BY FORMING SUCH ARTICLE DURING THE LOW TEMPERATURE ANIONIC POLYMERIZATION OF A HIGHER LACTAM COMPRISING THE STEPS OF FILLING THE MOLD WITH A VOLATILE ORGANIC MATERIAL THAT IS SOLUBLE IN SAID LACTAM, VOLATILIZING SAID ORGANIC MATERIAL TO DISPLACE THE LESS SOLUBLE GASES PRESENT, CHARGING SAID MOLD WITH SAID LACTAM, AND POLYMERIZING THE LACTAM IN SAID MOLD AT SUBSTANTIALLY ATMOSPHERIC PRESSURES AND BELOW THE MELTING POINT OF THE POLYMERIZED POLYLACTAM.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |