Patent US2449783A successfully refreshed from Google Patents.
US2449783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coating the inside surfaces of tubular vitreous envelopes
Assignee: Westinghouse Electric Corp
•
Filing: 1943-09-30
•
Granted: 1948-09-21
•
Expires: 1963-09-30
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Laidig
- 👤 Frederick T May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:44
CPC Classifications
B; B05; B05C; B05C7/00; B05C7/04; C; C23; C23D; C23D5/00; Y; Y10; Y10S; Y10S118/00; Y10S118/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2016060A
Cited
US2197204A
Cited
US2318060A
Cited
US2317977A
Cited
US2305090A
Cited
US2309612A
Cited
US2303290A
Cited
US2392229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |