Patent US3280528A successfully refreshed from Google Patents.
US3280528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof installation having cellular base sheets
Assignee: Armstrong World Industries Inc
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Filing: 1963-06-27
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Granted: 1966-10-25
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Expires: 1983-06-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Alan A Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:30
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/15; E04D13/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A ROOF INSTALLATION ADAPTED TO MAINTAIN THE ROOF IN A SEALED CONDITION IN SPITE OF THE OPENING AND CLOSING OF JOINTS AND CRACKS DURING THE NORMAL MOVEMENT OF ROOF SUPPORTS, THE INSTALLATION CONSISTING OF A ROOF HAVING SUBROOF STRUCTURAL SUPPORT MEMBERS, A FLEXIBLE PERFORMED CELLULAR RUBBER BASE SHEET ADHESIVELY SECURED TO THE TOP OF THE SUPPORT MEMBERS AND SPANNING THE JOINTS AND CRACKS THEREOF, SAID CELLULAR BASE SHEET HAVING CLOSED CELLS THROUGHOUT ITS DIMENSIONS, AND A TOP, WEATHER-RESISTANT COATING SUBSTANTIALLY COVERING AND OVERLAYING THE CELLULAR BASE SHEET, SAID BASE SHEET BEING CAPABLE OF FORMING A HIGHLY ELASTIC SLIP PLANE BETWEEN SAID SUBROOF SUPPORT MEMBERS AND SAID WEATHER RESISTANT COATING AND HAVING A THICKNESS OF 1/8-1/4 INCH, AN ELONGATION AT THE BREAKING POINT OF AT LEAST 150%, A DENSITY IN THE RANGE OF 6-9 POUNDS PER CUBIC FOOT, AND AN ELASTICITY CAPABLE OF MAINTAINING THE SHEET ELASTICALLY RESPONSIVE DURING THE NORMAL LOADING AND MOVEMENT OF THE STRUCTURAL SUPPORT MEMBERS.
Claim 2
Dependent Claim
158 words
A ROOF INSTALLATION ADAPTED TO MAINTAIN THE ROOF IN A SEALED CONDITION IN SPITE OF THE OPENING AND CLOSING OF JOINTS AND CRACKS DURING THE NORMAL MOVEMENT OF ROOF SUPPORTS, THE INSTALLATION CONSISTING OF A ROOF HAVING SUBROOF STRUCTURAL SUPPORT MEMBERS, A FLEXIBLE PERFORMED CELLULAR RUBBER BASE SHEET ADHESIVELY SECURED TO THE TOP OF THE SUPPORT MEMBERS AND SPANNING THE JOINTS AND CRACKS THEREOF, SAID CELLULAR BASE SHEET HAVING CLOSED CELLS THROUGHOUT ITS DIMENSIONS, AND A TOP, WEATHER-RESISTANT COATING SUBSTANTIALLY COVERING AND OVERLAYING THE CELLULAR BASE SHEET, SAID BASE SHEET BEING CAPABLE OF FORMING A HIGHLY ELASTIC SLIP PLANE BETWEEN SAID SUBROOF SUPPORT MEMBERS AND SAID WEATHER RESISTANT COATING AND HAVING A THICKNESS OF 1/8-1/4 INCH, AN ELONGATION AT THE BREAKING POINT OF AT LEAST 150%, A DENSITY IN THE RANGE OF 6-9 POUNDS PER CUBIC FOOT, AND AN ELASTICITY CAPABLE OF MAINTAINING THE SHEET ELASTICALLY RESPONSIVE DURING THE NORMAL LOADING AND MOVEMENT OF THE STRUCTURAL SUPPORT MEMBERS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |