Patent US3387809A successfully refreshed from Google Patents.
US3387809A
Expired / Lapsed
US
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Enclosure system and components thereof
Assignee: SEYMOUR J ZWERLING
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Filing: 1965-10-24
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Granted: 1968-06-11
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Seymour J Zwerling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:07
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/006; F16L23/00; F16L23/12; F16L23/14; F24; F24F; F24F13/00; F24F13/02; F24F13/0209; F24F13/0254
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1225478A
Cited
US1255219A
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US1796529A
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US2491700A
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US2627430A
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US3091487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |