US3222154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of flat glass
Assignee: Pilkington Group Ltd
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Filing: 1962-03-26
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Granted: 1965-12-07
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Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Lionel A B Pilkington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:10
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/04; C03B18/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A METHOD OF MANUFACTURING FLAT GLASS HAVING A PREDETERMINED THICKNESS, COMPRISING THE STEPS OF ADVANCING A RIBBON OF GLASS FORWARDLY ALONG A BATH OF MOLTEN METAL, THERMALLY CONDITIONING THE GLASS AS IT IS ADVANCED TO ENSURE THAT A PART OF THE RIBBON OF GLASS PASSING ALONG A ZONE OF SAID BATH IS STIFFENED SUFFICIENTLY AT SAID ZONE TO BE CAPABLE OF BEING GRIPPED, GRIPPING THE STIFFENED PART OF THE RIBBON AT SAID ZONE IN ORDER TO CONTROL THE VELOCITY OF THAT PART OF THE RIBBON ALONG THE BATH AT SAID ZONE, CONTINUING THE ADVANCE OF THE STIFFENED PART OF THE RIBBON ALONG THE BATH BEYOND SAID ZONE AT THE CONTROLLED VELOCITY, PROGRESSIVELY HEATING THE STIFFENED PART OF THE RIBBON FORWARDLY BEYOND SAID ZONE TO A TRANSITIONAL PLASTIC STATE AS IT IS FURTHER ADVANCED WHILE IMPOSING LONGITUDINALLY DIRECTED TRACTIVE FORCE ON THE GLASS IN THAT TRANSITIONAL PLASTIC STATE TO ACCELERATE THE PLASTIC GLASS THEREBY EFFECTING A PREDETERMINED REDUCTION IN THICKNESS OF THE RIBBON, THE GRIPPED
Claim 2
Independent Claim
164 words
A METHOD OF MANUFACTURING FLAT GLASS HAVING A PREDETERMINED THICKNESS, COMPRISING THE STEPS OF ADVANCING A RIBBON OF GLASS FORWARDLY ALONG A BATH OF MOLTEN METAL, THERMALLY CONDITIONING THE GLASS AS IT IS ADVANCED TO ENSURE THAT A PART OF THE RIBBON OF GLASS PASSING ALONG A ZONE OF SAID BATH IS STIFFENED SUFFICIENTLY AT SAID ZONE TO BE CAPABLE OF BEING GRIPPED, GRIPPING THE STIFFENED PART OF THE RIBBON AT SAID ZONE IN ORDER TO CONTROL THE VELOCITY OF THAT PART OF THE RIBBON ALONG THE BATH AT SAID ZONE, CONTINUING THE ADVANCE OF THE STIFFENED PART OF THE RIBBON ALONG THE BATH BEYOND SAID ZONE AT THE CONTROLLED VELOCITY, PROGRESSIVELY HEATING THE STIFFENED PART OF THE RIBBON FORWARDLY BEYOND SAID ZONE TO A TRANSITIONAL PLASTIC STATE AS IT IS FURTHER ADVANCED WHILE IMPOSING LONGITUDINALLY DIRECTED TRACTIVE FORCE ON THE GLASS IN THAT TRANSITIONAL PLASTIC STATE TO ACCELERATE THE PLASTIC GLASS THEREBY EFFECTING A PREDETERMINED REDUCTION IN THICKNESS OF THE RIBBON, THE GRIPPED
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |