US3379609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-felted building product including nonfibrous cellulose binder
Assignee: United States Gypsum Co
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Filing: 1964-01-16
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Granted: 1968-04-23
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Expires: 1984-01-16
Abstract
No abstract record available.
Inventors
- 👤 James R Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:48
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/18; C; C04; C04B; C04B26/00; C04B26/02; C04B26/28; C04B26/285; C04B28/00; C04B28/001; D21H11/00; D21H11/02; D21H11/04; D21H13/00; D21H13/36; D21H13/38; D21H13/40; D21J; D21J1/00
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |