Patent US3439461A successfully refreshed from Google Patents.
US3439461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burial vaults
Assignee: Wilbert Inc
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Filing: 1968-04-01
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Granted: 1969-04-22
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Expires: 1988-04-01
Abstract
No abstract record available.
Inventors
- 👤 Wesley M Chandler
- 👤 Paul F Heuser
- 👤 Bernard T Juba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:34
CPC Classifications
E; E04; E04H; E04H13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3283386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |