US2633672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sealing glass ampoules
Assignee: Individual
•
Filing: 1950-04-13
•
Granted: 1953-04-07
•
Expires: 1970-04-13
Abstract
No abstract record available.
Inventors
- 👤 John D Ralston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR551599A
Cited
DE637943C
Cited
DE671056C
Cited
US2199332A
Cited
US2051764A
Cited
US2168509A
Cited
US2270152A
Cited
US2258408A
Cited
US2379342A
Cited
GB588805A
Cited
US2529109A
Cited
US2500522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |