US3223499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating and conveying glass sheets
Assignee: PPG Industries Inc
•
Filing: 1962-06-04
•
Granted: 1965-12-14
•
Expires: 1982-06-04
Abstract
No abstract record available.
Inventors
- 👤 James H Cypher
- 👤 Jr Charles R Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:59
CPC Classifications
C; C03; C03B; C03B35/00; C03B35/14; C03B35/16; C03B29/00; C03B29/04; C03B29/06; C03B29/08; C03B29/12; C03B35/18; C03B35/189; C03B35/22; C03B35/24; C03B35/243; C03B2225/00; C03B2225/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A METHOD OF TREATING A GLASS SHEET, THE STEPS COMPRISING SUPPORTING SAID SHEET ON ROLLING SUPPORTS, MOVING SAID SHEET ALONG A PATH OF TRAVEL FORMED BY SAID ROLLING SUPPORTS, DIFFERENTIALLY SUPPLYING HEAT TO THE SUPPORTED AND UNSUPORTED SIDE SO AS TO BOW THE CENTRAL PORTION OF THE GLASS SHEET OUT OF CONTACT WITH THE ROLL-
Claim 2
Dependent Claim
56 words
IN A METHOD OF TREATING A GLASS SHEET, THE STEPS COMPRISING SUPPORTING SAID SHEET ON ROLLING SUPPORTS, MOVING SAID SHEET ALONG A PATH OF TRAVEL FORMED BY SAID ROLLING SUPPORTS, DIFFERENTIALLY SUPPLYING HEAT TO THE SUPPORTED AND UNSUPORTED SIDE SO AS TO BOW THE CENTRAL PORTION OF THE GLASS SHEET OUT OF CONTACT WITH THE ROLL-
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |