US3454080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete pressure vessel and method of constructing same
Assignee: Sulzer AG
•
Filing: 1966-04-27
•
Granted: 1969-07-08
•
Expires: 1986-04-27
Abstract
No abstract record available.
Inventors
- 👤 Albert Kunzli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:45
CPC Classifications
G; G21; G21C; G21C15/00; G21C15/02; G21C15/12; E; E04; E04H; E04H7/00; E04H7/02; E04H7/18; E04H7/20; G21C13/00; G21C13/08; G21C13/093; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1303667A
Cited
US1944787A
Cited
US3088890A
Cited
GB800388A
Cited
FR1323737A
Cited
US3260020A
Cited
US3175958A
Cited
FR1353275A
Cited
GB997882A
Cited
US3258403A
Cited
GB1017365A
Cited
GB936198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |