Patent US2312275A successfully refreshed from Google Patents.
US2881937A
Expired / Lapsed
US
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Stopper for ampoules and the like
Assignee: Individual
•
Filing: 1954-06-04
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Granted: 1959-04-14
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Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Roberts Charles Buford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/002; A; A61; A61J; A61J1/00; A61J1/14; A61J1/1475; A61J1/1487; B65D47/00; B65D47/04; B65D47/20; B65D47/2018; B65D47/2031; B65D47/2056; A61J1/1468
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB365984A
Cited
GB189522755A
Cited
US1247497A
Cited
US1892988A
Cited
US2115035A
Cited
US2392602A
Cited
US2411216A
Cited
FR973069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |