Patent US2689985A successfully refreshed from Google Patents.
US2689985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluff making apparatus
Assignee: Paper Patents Co
•
Filing: 1947-04-18
•
Granted: 1954-09-28
•
Expires: 1967-04-18
Abstract
No abstract record available.
Inventors
- 👤 William H Burger
- 👤 Wheelhouse Walter Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:03
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/26; D21H27/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE294079C
Cited
US1299982A
Cited
US1713309A
Cited
US1736142A
Cited
US1774393A
Cited
US1758539A
Cited
US1952208A
Cited
GB422226A
Cited
US2152901A
Cited
US2195158A
Cited
US2280250A
Cited
US2319666A
Cited
US2375284A
Cited
US2450511A
Cited
US2577784A
Cited
US2569765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |