Patent US3497579A successfully refreshed from Google Patents.
US3497579A
Expired / Lapsed
US
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Slip forming apparatus and method
Assignee: Individual
•
Filing: 1965-03-25
•
Granted: 1970-02-24
•
Expires: 1985-03-25
Abstract
No abstract record available.
Inventors
- 👤 Maurice Barron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:53
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/06; E04G11/20; E04G11/26; E04G11/22
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |