US3549738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing fibrous products having integral tongue and groove edges
Assignee: Johns Manville Corp
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Filing: 1968-09-30
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Granted: 1970-12-22
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Expires: 1988-09-30
Abstract
No abstract record available.
Inventors
- 👤 Richard Lloyd Troyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:55
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/0044; B27; B27N; B27N3/00; B27N3/08; B27N3/18; B27N3/183; B29C67/24; B29C67/248; B29C67/249; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/52; B29K; B29K2309/00; B29K2309/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |