Patent US3590897A successfully refreshed from Google Patents.
US2700007A
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Method and apparatus for shaping a plastic interlayer for a curved laminated windshield
Assignee: PPG Industries Inc
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Filing: 1952-08-15
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Granted: 1955-01-18
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Expires: 1972-08-15
Abstract
No abstract record available.
Inventors
- 👤 Brook J Dennison
- 👤 William G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:16
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10807; B32B17/10981; B29; B29C; B29C67/00; B29C67/0011; B32B17/10165; B32B17/10339; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1744; Y10T156/1751; Y10T156/1761
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF PREFORMING A PLASTIC INTERLAYER FOR A LAMINATED WINDSHIELD COMPRISING THE STEPS OF APPLYING A TRANSVERSE BAND OF COLOR ACROSS THE UPPER PORTION OF A PLASTIC SHEET, STRETCHING SAID SHEET IN A TRANSVERSE DIRECTION WITH MORE STRETCH BEING APPLIED TO THE LOWER PORTION OF THE SHEET THAN TO THE UPPER OF THE SHEET, AND HEATING SAID SHEET WHILE STRETCHED TO RELIEVE TENSION STRESSES THEREIN AND TO SAG THE CENTRAL PORTION OF SAID SHEET DOWNWARD.
Claim 2
Independent Claim
76 words
THE METHOD OF PREFORMING A PLASTIC INTERLAYER FOR A LAMINATED WINDSHIELD COMPRISING THE STEPS OF APPLYING A TRANSVERSE BAND OF COLOR ACROSS THE UPPER PORTION OF A PLASTIC SHEET, STRETCHING SAID SHEET IN A TRANSVERSE DIRECTION WITH MORE STRETCH BEING APPLIED TO THE LOWER PORTION OF THE SHEET THAN TO THE UPPER OF THE SHEET, AND HEATING SAID SHEET WHILE STRETCHED TO RELIEVE TENSION STRESSES THEREIN AND TO SAG THE CENTRAL PORTION OF SAID SHEET DOWNWARD.
References Cited (Backward Citations)
US2515830A
Cited
US2593405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |