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US3474996A
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Assignee: DAVID H STAMM
•
Filing: 1966-10-12
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Granted: 1969-10-28
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Expires: 1986-10-12
Abstract
No abstract record available.
Inventors
- 👤 David H Stamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:53
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/14; B; B44; B44D; B44D3/00; B44D3/12; B44D3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US407079A
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US606763A
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US1216214A
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US1452182A
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US1645879A
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US2694825A
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US2963761A
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US3009677A
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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) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |