Patent US3429473A successfully refreshed from Google Patents.
US3429473A
Expired / Lapsed
US
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Precast segment liquid storage tank
Assignee: A D L CEMENT PRODUCTS Inc
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Filing: 1966-07-05
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Granted: 1969-02-25
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Albert L Vroman
- 👤 Leo E Boucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:05
CPC Classifications
E; E04; E04H; E04H7/00; E04H7/02; E04H7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1684050A
Cited
US1872590A
Cited
US2000897A
Cited
US2204195A
Cited
US2684134A
Cited
US2903878A
Cited
US3106044A
Cited
US3113401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |