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US3474483A
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Assignee: CARL E HEIDLAND
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Filing: 1967-03-13
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Granted: 1969-10-28
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Expires: 1987-03-13
Abstract
No abstract record available.
Inventors
- 👤 Carl E Heidland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:59
CPC Classifications
E; E01; E01H; E01H1/00; E01H1/08; E01H1/0827; E01H1/0836; E01H1/0845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2803847A
Cited
US2830510A
Cited
US3004279A
Cited
GB847709A
Cited
US3229320A
Cited
US3348258A
Cited
US3406424A
Cited
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 |