Patent US3507301A successfully refreshed from Google Patents.
US3507301A
Expired / Lapsed
US
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Collector and method of making the same
Assignee: ROBERT H LARSON
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Filing: 1966-04-21
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Granted: 1970-04-21
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Expires: 1986-04-21
Abstract
No abstract record available.
Inventors
- 👤 Robert H Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:14
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/10; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4392; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T29/00; Y10T29/49; Y10T29/49398
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2798745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |