US4449345B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4449345B1 - - Google Patents
Assignee: Johns Manville
•
Filing: 1983-04-29
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Granted: 1991-03-12
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Expires: 2003-04-29
Abstract
No abstract record available.
Inventors
- 👤 A Hounsel Mack
- 👤 O Byrd Carlisle Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:47
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/0043; F27D1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-11 | 1994-09-10 | 1995-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-11 | 1998-09-10 | 1999-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-11 | 2002-09-10 | 2003-03-12 | $7700.00 | Window Closed / Lapsed |