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US3513638A
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Assignee: HENRY T YOUNG
•
Filing: 1968-03-08
•
Granted: 1970-05-26
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Expires: 1988-03-08
Abstract
No abstract record available.
Inventors
- 👤 Henry T Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:02
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/4272; B01D46/66; B01D46/70; B01D46/71
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1784339A
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GB788166A
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FR1239745A
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US2974748A
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US3057137A
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US3204390A
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US3390512A
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US3421295A
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US3394532A
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US3368328A
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US3377783A
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US3385033A
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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) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |