Patent US3329631A successfully refreshed from Google Patents.
US3329631A
Expired / Lapsed
US
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Cellular urea formaldehyde resin, pellets thereof, and method for making the same
Assignee: BPB Ltd
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Filing: 1963-10-23
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Granted: 1967-07-04
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Pilgrim Thomas Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:46
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/461; C08J3/00; C08J3/12; C08J2361/00; C08J2361/20; C08J2361/22; C08J2361/24; Y; Y10; Y10S; Y10S261/00; Y10S261/26; Y10S264/00; Y10S264/02; Y10S521/00; Y10S521/917; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A CURED CELLULAR UREA FORMALDEHYDE RESIN IN WHICH THE WALLS OF THE CELLS THEREOF ARE SO THIN THAT THE AVERAGE BULK OF SOLID BETWEEN THE CELLS IS NOT GREATER THAN THAT WHICH OBTAINS WHEN THE TOTAL VOLUME OF THE SOLID RESIN PER UNIT VOLUME OF THE CELLULAR RESIN IS 2.2% AND THE AVERAGE NUMBER OF CELLS PER CUBIC CENTIMETRE IS 10**6.
Claim 2
Dependent Claim
61 words
A CURED CELLULAR UREA FORMALDEHYDE RESIN IN WHICH THE WALLS OF THE CELLS THEREOF ARE SO THIN THAT THE AVERAGE BULK OF SOLID BETWEEN THE CELLS IS NOT GREATER THAN THAT WHICH OBTAINS WHEN THE TOTAL VOLUME OF THE SOLID RESIN PER UNIT VOLUME OF THE CELLULAR RESIN IS 2.2% AND THE AVERAGE NUMBER OF CELLS PER CUBIC CENTIMETRE IS 10**6.
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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |