US3177060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming deep-sided vessels from thermoplastic sheets
Assignee: Individual
•
Filing: 1959-05-28
•
Granted: 1965-04-06
•
Expires: 1979-05-28
Abstract
No abstract record available.
Inventors
- 👤 Norman E Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:02
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/035; C03B23/0352; C03B23/0357; B; B29; B29C; B29C51/00; B29C51/18; B29C51/20; B29C51/22; B29C51/26; B29C51/42; B29C51/421
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
THE METHOD OF FORMING SHEET GLASS INTO NON-PLANAR SHAPES BY MEANS OF A CAVITY MOLD, WHOCH COMPRISES HEATING THE MOLD TO A TEMPERATURE APPROXIMATING THE TEMPERATURE AT WHICH THE GLASS SOFTENS, THEN PLACING THE GLASS SHEET TO BE PROCESSED OVER THE MOLD WITH ITS MARGINS SUPPORTED BY THE RIM OF THE MOLD AND QUICKLY BRINGING THE EDGES UP TO A TEMPERATURE APPROXIMATING THE SOFTENING POINT OF THE GLASS WHILE ALSO HEATING THE AREA OF THE GLASS OVER THE MOLD BY RADIATION, CLAMPING THE MARGINS OF THE GLASS SHEET AGAINST THE RIM OF THE MOLD, HEATING THE GLASS WHILE SO CLAMPED TO ITS SOFTENING TEMPERATURE BUT BELOW ITS MELTING POINT WHILE PROTECTING IT FROM EXTERNAL DRAFTS OF AIR, AND WHEN THE GLASS HAS BECOME SUFFICIENTLY SOFT, EXHAUSTING AIR FROM THE MOLD CAVITY AND DRAWING THE SHEET DOWN INTO THE MOLD, THEREAFTER ALLOWING THE PIECE SO FORMED TO PARTLY COOL IN THE MOLD ONLY SUFFICIENTLY FOR IT TO SHRINK FROM THE MOLD WALLS AND THEN THEREAFTER REMOVING IT FROM THE MOLD WHILE THE MOLD IS MAINTAINED AT A TEMPERATURE OF APPROXIMATELY AT LEAST 1000*F.
Claim 2
Independent Claim
182 words
THE METHOD OF FORMING SHEET GLASS INTO NON-PLANAR SHAPES BY MEANS OF A CAVITY MOLD, WHOCH COMPRISES HEATING THE MOLD TO A TEMPERATURE APPROXIMATING THE TEMPERATURE AT WHICH THE GLASS SOFTENS, THEN PLACING THE GLASS SHEET TO BE PROCESSED OVER THE MOLD WITH ITS MARGINS SUPPORTED BY THE RIM OF THE MOLD AND QUICKLY BRINGING THE EDGES UP TO A TEMPERATURE APPROXIMATING THE SOFTENING POINT OF THE GLASS WHILE ALSO HEATING THE AREA OF THE GLASS OVER THE MOLD BY RADIATION, CLAMPING THE MARGINS OF THE GLASS SHEET AGAINST THE RIM OF THE MOLD, HEATING THE GLASS WHILE SO CLAMPED TO ITS SOFTENING TEMPERATURE BUT BELOW ITS MELTING POINT WHILE PROTECTING IT FROM EXTERNAL DRAFTS OF AIR, AND WHEN THE GLASS HAS BECOME SUFFICIENTLY SOFT, EXHAUSTING AIR FROM THE MOLD CAVITY AND DRAWING THE SHEET DOWN INTO THE MOLD, THEREAFTER ALLOWING THE PIECE SO FORMED TO PARTLY COOL IN THE MOLD ONLY SUFFICIENTLY FOR IT TO SHRINK FROM THE MOLD WALLS AND THEN THEREAFTER REMOVING IT FROM THE MOLD WHILE THE MOLD IS MAINTAINED AT A TEMPERATURE OF APPROXIMATELY AT LEAST 1000*F.
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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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |