Patent US1928259A successfully refreshed from Google Patents.
US1928259A
Expired / Lapsed
US
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Gasket for packer assemblies
Assignee: WILLIAM D SHAFFER
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Filing: 1930-02-24
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Granted: 1933-09-26
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Expires: 1950-02-24
Abstract
No abstract record available.
Inventors
- 👤 Mccabe Otho Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:49
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/04; E21B2200/00; E21B2200/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-09-25 | 1937-03-27 | 1937-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-09-25 | 1941-03-27 | 1941-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-09-25 | 1945-03-27 | 1945-09-26 | $7700.00 | Window Closed / Lapsed |