US2719386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrically heating and welding glass elements
Assignee: PPG Industries Inc
•
Filing: 1952-04-30
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Granted: 1955-10-04
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Expires: 1972-04-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Johnson
- 👤 Reverdy E Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:16
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C03; C03B; C03B23/00; C03B23/20; C03B23/24; C03B23/245; C03B29/00; E; E06; E06B; E06B3/00; E06B3/66; E06B3/6608
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2570827A
Cited
DE665474C
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US2176879A
Cited
US2389360A
Cited
US2394051A
Cited
US2445374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |