US3022210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making molding compounds of glass fiber reinforced plastics
Assignee: Owens Corning
•
Filing: 1955-12-29
•
Granted: 1962-02-20
•
Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Philipps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:33
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; B; B29; B29B; B29B9/00; B29B9/12; B29B9/14; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN THE PREPARATION OF A THERMOPLASTIC MOLDING COMPOUND OF THE COMBINATION OF A THERMOPLASTIC RESINOUS POLYMER AND GLASS FIBERS OF REINFORCING LENGTHS, THE STEPS OF HEATING A POLYSTYRENE HAVING AN AVERAGE MOLECULAR WEIGHT OF LESS THAN 20,000 TO A TEMPERATURE SUFFICIENT TO REDUCE THE POLYSTYRENE RESINOUS POLYMER TO A FLUID STATE BUT BELOW THAT AT WHICH THE POLYSTYRENE IS SUBJECT TO THERMAL DECOMPOSITION, ADVANCING GLASS FIBERS THROUGH THE HOT MELT OF THE POLYSTYRENE WHEREBY AN AMOUNT OF POLYSTYRENE REMAINS AS A COATING ON THE GLASS FIBER SURFACES SUFFICIENT FOR USE AS A MOLDING COMPOUND, COOLING THE COATED GLASS FIBERS TO SOLIDIFY THE POLYSTYRENE ON THE SURFACES THEREOF, AND THEN REDUCING THE COATED GLASS FIBERS TO LENGTHS WITHIN THE RANGE OF 1/8 TO 1 INCH.
Claim 2
Dependent Claim
124 words
IN THE PREPARATION OF A THERMOPLASTIC MOLDING COMPOUND OF THE COMBINATION OF A THERMOPLASTIC RESINOUS POLYMER AND GLASS FIBERS OF REINFORCING LENGTHS, THE STEPS OF HEATING A POLYSTYRENE HAVING AN AVERAGE MOLECULAR WEIGHT OF LESS THAN 20,000 TO A TEMPERATURE SUFFICIENT TO REDUCE THE POLYSTYRENE RESINOUS POLYMER TO A FLUID STATE BUT BELOW THAT AT WHICH THE POLYSTYRENE IS SUBJECT TO THERMAL DECOMPOSITION, ADVANCING GLASS FIBERS THROUGH THE HOT MELT OF THE POLYSTYRENE WHEREBY AN AMOUNT OF POLYSTYRENE REMAINS AS A COATING ON THE GLASS FIBER SURFACES SUFFICIENT FOR USE AS A MOLDING COMPOUND, COOLING THE COATED GLASS FIBERS TO SOLIDIFY THE POLYSTYRENE ON THE SURFACES THEREOF, AND THEN REDUCING THE COATED GLASS FIBERS TO LENGTHS WITHIN THE RANGE OF 1/8 TO 1 INCH.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |