US3483704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel liner and method of making same
Assignee: Individual
•
Filing: 1966-12-16
•
Granted: 1969-12-16
•
Expires: 1986-12-16
Abstract
No abstract record available.
Inventors
- 👤 John R Tabor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:57
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/04; E21D11/08; Y; Y10; Y10T; Y10T403/00; Y10T403/55; Y10T403/557
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US325657A
Cited
US712839A
Cited
US958592A
Cited
US1043348A
Cited
US1881421A
Cited
US1889563A
Cited
GB724853A
Cited
US3157417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |