US2750302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a non-blooming asbestos cement shingle and product thereof
Assignee: PATENT LICENSING Corp
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Filing: 1955-05-06
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Granted: 1956-06-12
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Expires: 1975-05-06
Abstract
No abstract record available.
Inventors
- 👤 Frank V Camarda
- 👤 Frank J Gumbs
- 👤 Robert B Lovell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:35
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/52; C04B41/50; C04B41/5076; C04B41/5089; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/269; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A PROCESS FOR PREPARING A NON-BLOOMING ASBESTOSCEMENT SHINGLE COMPRISING APPLYING A THIN FILM OF WAX EMULSION PRIOR TO THE CURING OF THE SHINGLE AND AFTER CURING THE SHINGLE PREHEATING THE SHINGLE TO A TEMPERATURE OF 125* TO 145* F. AND APPLYING THERETO AN EMULSION CONTAINING ABOUT 4 PARTS OF POLYETHYLENE RESIN, ABOUT 2 PARTS OF SODIUM SILICATE AND ABOUT 3 PARTS OF ACRYLIC RESIN AND DRYING THE SHINGLE.
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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |