US3478480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin stone supporting and anchoring system
Assignee: WILLIAM E SWENSON
•
Filing: 1968-06-17
•
Granted: 1969-11-18
•
Expires: 1988-06-17
Abstract
No abstract record available.
Inventors
- 👤 William E Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:11
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0803; E04F13/081; E04F13/0821; E04F13/0825; E04F13/0832; E04F13/0833; E04F13/0846
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US581940A
Cited
US1552392A
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AT118080B
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US2132547A
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US2413183A
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US2860504A
Cited
US3319983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |