Patent US2961698A successfully refreshed from Google Patents.
US2961698A
Expired / Lapsed
US
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Process and apparatus for producing fibrous mats
Assignee: Johns Manville Fiber Glass Inc
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Filing: 1956-09-17
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Granted: 1960-11-29
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Expires: 1976-09-17
Abstract
No abstract record available.
Inventors
- 👤 William F Rea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:40
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/06; D; D04; D04H; D04H1/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |