US2865139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of glass
Assignee: AT&T Inc
•
Filing: 1955-05-31
•
Granted: 1958-12-23
•
Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Orson L Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:42
CPC Classifications
C; C03; C03B; C03B32/00; C03B19/00; C03B19/06; C03B23/00; C03B23/0013; C03B29/00; C03B29/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2215214A
Cited
US2367111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |