US3481724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for tempering glass sheets between opposed gas flows
Assignee: PPG Industries Inc
•
Filing: 1966-07-21
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Granted: 1969-12-02
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Expires: 1986-07-21
Abstract
No abstract record available.
Inventors
- 👤 Eugene W Starr
- 👤 George W Misson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:06
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/0404; B; B29; B29C; B29C48/00; B29C48/03; B29C48/15; B29C48/154; B29C48/155; C03B27/044; C03B27/048; C03B35/00; C03B35/14; C03B35/22; C03B35/24; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3338697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |