US3435853A
Expired / Lapsed
US
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Method and means for preventing liner contraction
Assignee: JOHN L DORE CO
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Filing: 1967-01-25
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Granted: 1969-04-01
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Expires: 1987-01-25
Abstract
No abstract record available.
Inventors
- 👤 Frank G Weeden
- 👤 Gerald R Pope
- 👤 Willard L Petrosky
- 👤 Burleigh R Murphee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:24
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/26; B29C63/34; B29C63/346; F; F16; F16L; F16L23/00; F16L23/12; F16L23/125; F16L58/00; F16L58/18; F16L58/187; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49874
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1005103A
Cited
US3000433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |