Patent US2820467A successfully refreshed from Google Patents.
US2820467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adapters for flushing guns and the like
Assignee: Individual
•
Filing: 1952-05-15
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Granted: 1958-01-21
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Expires: 1972-05-15
Abstract
No abstract record available.
Inventors
- 👤 Stephen M Mattich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:31
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/30; E03C1/304; F; F28; F28G; F28G9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1476969A
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GB189770A
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US1605749A
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US1820552A
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US1939836A
Cited
US1998902A
Cited
US1988198A
Cited
US2240364A
Cited
US2324804A
Cited
US2450308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |