Patent US3452741A successfully refreshed from Google Patents.
US3452741A
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US
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Assignee: RICHARD C SCHAFFER
•
Filing: 1966-05-27
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Granted: 1969-07-01
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Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 Richard C Schaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:03
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0291; A61B17/00; A61B17/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3203095A
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US3345981A
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US3357422A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |