Patent US2633672A successfully refreshed from Google Patents.
US2633672A
Expired / Lapsed
US
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Apparatus for sealing glass ampoules
Assignee: Individual
•
Filing: 1950-04-13
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Granted: 1953-04-07
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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 22:07
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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DE637943C
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US2199332A
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US2051764A
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US2168509A
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US2270152A
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US2258408A
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US2379342A
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GB588805A
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US2529109A
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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 |