Patent US3487140A successfully refreshed from Google Patents.
US3487140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of stoneware drainage pipes
Assignee: Individual
•
Filing: 1966-02-15
•
Granted: 1969-12-30
•
Expires: 1986-02-15
Abstract
No abstract record available.
Inventors
- 👤 Servatius Laux
- 👤 Arno Stroder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:05
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/70; B28B21/74; E; E03; E03C; E03C1/00; E03C1/12; E03C1/122; F; F16; F16L; F16L41/00; F16L41/002; Y; Y10; Y10S; Y10S425/00; Y10S425/218
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US737841A
Cited
US1622012A
Cited
GB268220A
Cited
US1779811A
Cited
DE510786C
Cited
US2699591A
Cited
US2681494A
Cited
US3200184A
Cited
US3340337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |