US3510391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perlite board bonded to organic plastic foam
Assignee: Grefco Inc
•
Filing: 1967-05-15
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Granted: 1970-05-05
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Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Lyle R Bolster
- 👤 Harland E Tarbell
- 👤 Donald W Mogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:20
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/249987; Y10T428/24999; Y10T428/26; Y10T428/266; Y10T428/269; Y10T428/31504; Y10T428/31511; Y10T428/31515
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) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |