US2951305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dulling a polyethylene terephthalate film surface
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1956-11-28
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Granted: 1960-09-06
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Expires: 1976-11-28
Abstract
No abstract record available.
Inventors
- 👤 Seymour Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:16
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B24; B24B; B24B1/00; B29C2059/027; B29K; B29K2067/00; Y; Y10; Y10T; Y10T29/00; Y10T29/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR DULLING THE SURFACE OF A RELATIVELY FLAT LAMINATED PLASTIC SHEET HAVING A HARD TRANSPARENT SURFACE LAYER OF A POLYETHYLENE TEREPHTHALATE THEREON WITH A THICKNESS OF .0002 TO .0015 INCH, COMPRISING THE STEPS OF BRUSHING SAID SURFACE AND REMOVING POLYETHYLENE TEREPHTHALATE MATERIAL THEREFROM WITH A ROTATING BRUSH HAVING A CENTER CYLINDRICAL CORE AND A PLURALITY OF .0030 TO .0045 INCH DIAMETER FLEXIBLE WIRE BRISTLES OF A HARDNESS
Claim 2
Dependent Claim
69 words
A PROCESS FOR DULLING THE SURFACE OF A RELATIVELY FLAT LAMINATED PLASTIC SHEET HAVING A HARD TRANSPARENT SURFACE LAYER OF A POLYETHYLENE TEREPHTHALATE THEREON WITH A THICKNESS OF .0002 TO .0015 INCH, COMPRISING THE STEPS OF BRUSHING SAID SURFACE AND REMOVING POLYETHYLENE TEREPHTHALATE MATERIAL THEREFROM WITH A ROTATING BRUSH HAVING A CENTER CYLINDRICAL CORE AND A PLURALITY OF .0030 TO .0045 INCH DIAMETER FLEXIBLE WIRE BRISTLES OF A HARDNESS
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) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |