US3276906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing fire-retardant bituminous shingles by coating same with thermosetting acrylic resin
Assignee: Shell USA Inc
•
Filing: 1963-08-08
•
Granted: 1966-10-04
•
Expires: 1983-08-08
Abstract
No abstract record available.
Inventors
- 👤 Carl L Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:00
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/24; B05D7/26; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS FOR PREPARING FLAME-RETARDANT BITUMINOUS ROOFING MATERIAL WHICH COMPRISES APPLYING A COATING OF A SUBSTANTIALLY AQUEOUS SOLUTION OF A THERMOSETTING ACRYLIC RESIN TO A BITUMINOUS-FELT ROOFING MATERIAL AND THEN EVAPORATING SAID SOLVENT.
Claim 2
Dependent Claim
33 words
A PROCESS FOR PREPARING FLAME-RETARDANT BITUMINOUS ROOFING MATERIAL WHICH COMPRISES APPLYING A COATING OF A SUBSTANTIALLY AQUEOUS SOLUTION OF A THERMOSETTING ACRYLIC RESIN TO A BITUMINOUS-FELT ROOFING MATERIAL AND THEN EVAPORATING SAID SOLVENT.
References Cited (Backward Citations)
US2716619A
Cited
US3038393A
Cited
US2906724A
Cited
US3024130A
Cited
US3096196A
Cited
US3102874A
Cited
US3190845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |