US3469816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for making slotted concrete floors for animal houses
Assignee: Fairfield Engineering and Manufacturing Co
•
Filing: 1967-05-02
•
Granted: 1969-09-30
•
Expires: 1987-05-02
Abstract
No abstract record available.
Inventors
- 👤 Ronald S Blough
- 👤 Albert E Gehlbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:33
CPC Classifications
E; E04; E04F; E04F15/00; E04F15/02; E04F15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1103247A
Cited
US1059974A
Cited
US1900301A
Cited
US1925775A
Cited
US2356603A
Cited
US2445894A
Cited
US2601082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |