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US2945267A
Expired / Lapsed
US
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Closure-operators
Assignee: Individual
•
Filing: 1958-07-03
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Granted: 1960-07-19
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Expires: 1978-07-03
Abstract
No abstract record available.
Inventors
- 👤 Michael J Tracy
- 👤 Midland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:12
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/50; E06B3/5036; E06B3/5009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1689307A
Cited
US2486407A
Cited
US2558140A
Cited
US2699579A
Cited
US2743796A
Cited
US2758834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |